diff --git a/src/mesa/drivers/dri/i915/intel_extensions.c b/src/mesa/drivers/dri/i915/intel_extensions.c
index 4f2c6fa34e3..c85bd787fe7 100644
--- a/src/mesa/drivers/dri/i915/intel_extensions.c
+++ b/src/mesa/drivers/dri/i915/intel_extensions.c
@@ -100,9 +100,6 @@ intelInitExtensions(struct gl_context *ctx)
          ctx->Extensions.ARB_occlusion_query = true;
    }
 
-   if (intel->ctx.Mesa_DXTn
-       || driQueryOptionb(&intel->optionCache, "force_s3tc_enable"))
-      ctx->Extensions.EXT_texture_compression_s3tc = true;
-
+   ctx->Extensions.EXT_texture_compression_s3tc = true;
    ctx->Extensions.ANGLE_texture_compression_dxt = true;
 }
diff --git a/src/mesa/drivers/dri/i965/intel_extensions.c b/src/mesa/drivers/dri/i965/intel_extensions.c
index 8aaea6fda23..9487b4ae70f 100644
--- a/src/mesa/drivers/dri/i965/intel_extensions.c
+++ b/src/mesa/drivers/dri/i965/intel_extensions.c
@@ -301,8 +301,6 @@ intelInitExtensions(struct gl_context *ctx)
    if (ctx->API != API_OPENGL_CORE)
       ctx->Extensions.ARB_color_buffer_float = true;
 
-   if (ctx->Mesa_DXTn || driQueryOptionb(&brw->optionCache, "force_s3tc_enable"))
-      ctx->Extensions.EXT_texture_compression_s3tc = true;
-
+   ctx->Extensions.EXT_texture_compression_s3tc = true;
    ctx->Extensions.ANGLE_texture_compression_dxt = true;
 }
diff --git a/src/mesa/drivers/dri/nouveau/nv10_context.c b/src/mesa/drivers/dri/nouveau/nv10_context.c
index 7a86ba2358d..be2178fb79e 100644
--- a/src/mesa/drivers/dri/nouveau/nv10_context.c
+++ b/src/mesa/drivers/dri/nouveau/nv10_context.c
@@ -451,10 +451,8 @@ nv10_context_create(struct nouveau_screen *screen, gl_api api,
 	ctx->Extensions.EXT_texture_env_dot3 = true;
 	ctx->Extensions.NV_fog_distance = true;
 	ctx->Extensions.NV_texture_rectangle = true;
-	if (ctx->Mesa_DXTn) {
-		ctx->Extensions.EXT_texture_compression_s3tc = true;
-		ctx->Extensions.ANGLE_texture_compression_dxt = true;
-	}
+	ctx->Extensions.EXT_texture_compression_s3tc = true;
+	ctx->Extensions.ANGLE_texture_compression_dxt = true;
 
 	/* GL constants. */
 	ctx->Const.MaxTextureLevels = 12;
diff --git a/src/mesa/drivers/dri/nouveau/nv20_context.c b/src/mesa/drivers/dri/nouveau/nv20_context.c
index ec638c036b1..0ab2db0b086 100644
--- a/src/mesa/drivers/dri/nouveau/nv20_context.c
+++ b/src/mesa/drivers/dri/nouveau/nv20_context.c
@@ -462,10 +462,8 @@ nv20_context_create(struct nouveau_screen *screen, gl_api api,
 	ctx->Extensions.EXT_texture_env_dot3 = true;
 	ctx->Extensions.NV_fog_distance = true;
 	ctx->Extensions.NV_texture_rectangle = true;
-	if (ctx->Mesa_DXTn) {
-		ctx->Extensions.EXT_texture_compression_s3tc = true;
-		ctx->Extensions.ANGLE_texture_compression_dxt = true;
-	}
+	ctx->Extensions.EXT_texture_compression_s3tc = true;
+	ctx->Extensions.ANGLE_texture_compression_dxt = true;
 
 	/* GL constants. */
 	ctx->Const.MaxTextureCoordUnits = NV20_TEXTURE_UNITS;
diff --git a/src/mesa/drivers/dri/r200/r200_context.c b/src/mesa/drivers/dri/r200/r200_context.c
index 0a27985de72..b6354dccbb9 100644
--- a/src/mesa/drivers/dri/r200/r200_context.c
+++ b/src/mesa/drivers/dri/r200/r200_context.c
@@ -363,14 +363,8 @@ GLboolean r200CreateContext( gl_api api,
 	others get the bit ordering right but don't actually do YUV-RGB conversion */
       ctx->Extensions.MESA_ycbcr_texture = true;
    }
-   if (rmesa->radeon.glCtx.Mesa_DXTn) {
-      ctx->Extensions.EXT_texture_compression_s3tc = true;
-      ctx->Extensions.ANGLE_texture_compression_dxt = true;
-   }
-   else if (driQueryOptionb (&rmesa->radeon.optionCache, "force_s3tc_enable")) {
-      ctx->Extensions.EXT_texture_compression_s3tc = true;
-      ctx->Extensions.ANGLE_texture_compression_dxt = true;
-   }
+   ctx->Extensions.EXT_texture_compression_s3tc = true;
+   ctx->Extensions.ANGLE_texture_compression_dxt = true;
 
 #if 0
    r200InitDriverFuncs( ctx );
diff --git a/src/mesa/drivers/dri/radeon/radeon_context.c b/src/mesa/drivers/dri/radeon/radeon_context.c
index 28a79860d72..c1ee8d8a767 100644
--- a/src/mesa/drivers/dri/radeon/radeon_context.c
+++ b/src/mesa/drivers/dri/radeon/radeon_context.c
@@ -311,14 +311,8 @@ r100CreateContext( gl_api api,
    ctx->Extensions.NV_texture_rectangle = true;
    ctx->Extensions.OES_EGL_image = true;
 
-   if (rmesa->radeon.glCtx.Mesa_DXTn) {
-      ctx->Extensions.EXT_texture_compression_s3tc = true;
-      ctx->Extensions.ANGLE_texture_compression_dxt = true;
-   }
-   else if (driQueryOptionb (&rmesa->radeon.optionCache, "force_s3tc_enable")) {
-      ctx->Extensions.EXT_texture_compression_s3tc = true;
-      ctx->Extensions.ANGLE_texture_compression_dxt = true;
-   }
+   ctx->Extensions.EXT_texture_compression_s3tc = true;
+   ctx->Extensions.ANGLE_texture_compression_dxt = true;
 
    /* XXX these should really go right after _mesa_init_driver_functions() */
    radeon_fbo_init(&rmesa->radeon);
diff --git a/src/mesa/main/context.c b/src/mesa/main/context.c
index 55a65ac2abe..676103d4778 100644
--- a/src/mesa/main/context.c
+++ b/src/mesa/main/context.c
@@ -866,8 +866,6 @@ init_attrib_groups(struct gl_context *ctx)
    if (!_mesa_init_texture( ctx ))
       return GL_FALSE;
 
-   _mesa_init_texture_s3tc( ctx );
-
    /* Miscellaneous */
    ctx->NewState = _NEW_ALL;
    ctx->NewDriverState = ~0;
diff --git a/src/mesa/main/extensions.c b/src/mesa/main/extensions.c
index 5a5fdd247f3..f185aa5aab5 100644
--- a/src/mesa/main/extensions.c
+++ b/src/mesa/main/extensions.c
@@ -177,10 +177,8 @@ _mesa_enable_sw_extensions(struct gl_context *ctx)
    ctx->Extensions.EXT_gpu_program_parameters = GL_TRUE;
    ctx->Extensions.OES_standard_derivatives = GL_TRUE;
    ctx->Extensions.TDFX_texture_compression_FXT1 = GL_TRUE;
-   if (ctx->Mesa_DXTn) {
-      ctx->Extensions.ANGLE_texture_compression_dxt = GL_TRUE;
-      ctx->Extensions.EXT_texture_compression_s3tc = GL_TRUE;
-   }
+   ctx->Extensions.ANGLE_texture_compression_dxt = GL_TRUE;
+   ctx->Extensions.EXT_texture_compression_s3tc = GL_TRUE;
 }
 
 /**
diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index db9ea760e01..abda1a36e46 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -4974,9 +4974,6 @@ struct gl_context
     */
    GLboolean HasConfig;
 
-   /** software compression/decompression supported or not */
-   GLboolean Mesa_DXTn;
-
    GLboolean TextureFormatSupported[MESA_FORMAT_COUNT];
 
    GLboolean RasterDiscard;  /**< GL_RASTERIZER_DISCARD */
diff --git a/src/mesa/main/texcompress_s3tc.c b/src/mesa/main/texcompress_s3tc.c
index 14067f0e991..a3bb340b4ee 100644
--- a/src/mesa/main/texcompress_s3tc.c
+++ b/src/mesa/main/texcompress_s3tc.c
@@ -43,13 +43,6 @@
 #include "util/format_srgb.h"
 
 
-void
-_mesa_init_texture_s3tc( struct gl_context *ctx )
-{
-   /* called during context initialization */
-   ctx->Mesa_DXTn = GL_TRUE;
-}
-
 /**
  * Store user's image in rgb_dxt1 format.
  */
diff --git a/src/mesa/main/texcompress_s3tc.h b/src/mesa/main/texcompress_s3tc.h
index 438b71fe332..0dbb5fc5371 100644
--- a/src/mesa/main/texcompress_s3tc.h
+++ b/src/mesa/main/texcompress_s3tc.h
@@ -44,9 +44,6 @@ extern GLboolean
 _mesa_texstore_rgba_dxt5(TEXSTORE_PARAMS);
 
 
-extern void
-_mesa_init_texture_s3tc(struct gl_context *ctx);
-
 extern compressed_fetch_func
 _mesa_get_dxt_fetch_func(mesa_format format);
 
diff --git a/src/mesa/main/texformat.c b/src/mesa/main/texformat.c
index baa3988f0a0..3f8e7a49a27 100644
--- a/src/mesa/main/texformat.c
+++ b/src/mesa/main/texformat.c
@@ -249,9 +249,7 @@ _mesa_choose_tex_format(struct gl_context *ctx, GLenum target,
        * 1D ARRAY textures in S3TC format.
        */
       if (target != GL_TEXTURE_1D && target != GL_TEXTURE_1D_ARRAY) {
-         if (ctx->Mesa_DXTn)
-            RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_DXT1);
-         RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_FXT1);
+         RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_DXT1);
       }
       RETURN_IF_SUPPORTED(MESA_FORMAT_BGR_UNORM8);
       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8X8_UNORM);
@@ -260,9 +258,7 @@ _mesa_choose_tex_format(struct gl_context *ctx, GLenum target,
    case GL_COMPRESSED_RGBA_ARB:
       /* We don't use texture compression for 1D and 1D array textures. */
       if (target != GL_TEXTURE_1D && target != GL_TEXTURE_1D_ARRAY) {
-         if (ctx->Mesa_DXTn)
-            RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_DXT3); /* Not rgba_dxt1, see spec */
-         RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FXT1);
+         RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_DXT3); /* Not rgba_dxt1, see spec */
       }
       RETURN_IF_SUPPORTED(MESA_FORMAT_A8B8G8R8_UNORM);
       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_UNORM);
@@ -502,15 +498,13 @@ _mesa_choose_tex_format(struct gl_context *ctx, GLenum target,
       RETURN_IF_SUPPORTED(MESA_FORMAT_A8R8G8B8_SRGB);
       break;
    case GL_COMPRESSED_SRGB_EXT:
-      if (ctx->Mesa_DXTn)
-         RETURN_IF_SUPPORTED(MESA_FORMAT_SRGB_DXT1);
+      RETURN_IF_SUPPORTED(MESA_FORMAT_SRGB_DXT1);
       RETURN_IF_SUPPORTED(MESA_FORMAT_BGR_SRGB8);
       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_SRGB);
       RETURN_IF_SUPPORTED(MESA_FORMAT_A8R8G8B8_SRGB);
       break;
    case GL_COMPRESSED_SRGB_ALPHA_EXT:
-      if (ctx->Mesa_DXTn)
-         RETURN_IF_SUPPORTED(MESA_FORMAT_SRGBA_DXT3); /* Not srgba_dxt1, see spec */
+      RETURN_IF_SUPPORTED(MESA_FORMAT_SRGBA_DXT3); /* Not srgba_dxt1, see spec */
       RETURN_IF_SUPPORTED(MESA_FORMAT_A8B8G8R8_SRGB);
       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_SRGB);
       RETURN_IF_SUPPORTED(MESA_FORMAT_A8R8G8B8_SRGB);
diff --git a/src/mesa/main/teximage.c b/src/mesa/main/teximage.c
index d0642051909..0a3025a2e6b 100644
--- a/src/mesa/main/teximage.c
+++ b/src/mesa/main/teximage.c
@@ -2769,38 +2769,6 @@ _mesa_choose_texture_format(struct gl_context *ctx,
       }
    }
 
-   /* If the application requested compression to an S3TC format but we don't
-    * have the DXTn library, force a generic compressed format instead.
-    */
-   if (internalFormat != format && format != GL_NONE) {
-      const GLenum before = internalFormat;
-
-      switch (internalFormat) {
-      case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
-         if (!ctx->Mesa_DXTn)
-            internalFormat = GL_COMPRESSED_RGB;
-         break;
-      case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
-      case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
-      case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
-         if (!ctx->Mesa_DXTn)
-            internalFormat = GL_COMPRESSED_RGBA;
-         break;
-      default:
-         break;
-      }
-
-      if (before != internalFormat) {
-         _mesa_warning(ctx,
-                       "DXT compression requested (%s), "
-                       "but libtxc_dxtn library not installed.  Using %s "
-                       "instead.",
-                       _mesa_enum_to_string(before),
-                       _mesa_enum_to_string(internalFormat));
-      }
-   }
-
-   /* choose format from scratch */
    f = ctx->Driver.ChooseTextureFormat(ctx, target, internalFormat,
                                        format, type);
    assert(f != MESA_FORMAT_NONE);
diff --git a/src/mesa/state_tracker/st_context.c b/src/mesa/state_tracker/st_context.c
index ef2e73e7415..2422640d849 100644
--- a/src/mesa/state_tracker/st_context.c
+++ b/src/mesa/state_tracker/st_context.c
@@ -406,7 +406,7 @@ st_create_context_priv( struct gl_context *ctx, struct pipe_context *pipe,
    /* GL limits and extensions */
    st_init_limits(pipe->screen, &ctx->Const, &ctx->Extensions);
    st_init_extensions(pipe->screen, &ctx->Const,
-                      &ctx->Extensions, &st->options, ctx->Mesa_DXTn);
+                      &ctx->Extensions, &st->options, GL_TRUE);
 
    if (st_have_perfmon(st)) {
       ctx->Extensions.AMD_performance_monitor = GL_TRUE;
diff --git a/src/mesa/state_tracker/st_format.c b/src/mesa/state_tracker/st_format.c
index 84b744e3df5..5e38fe56890 100644
--- a/src/mesa/state_tracker/st_format.c
+++ b/src/mesa/state_tracker/st_format.c
@@ -2280,13 +2280,13 @@ st_ChooseTextureFormat(struct gl_context *ctx, GLenum target,
    }
 
    pFormat = st_choose_format(st, internalFormat, format, type,
-                              pTarget, 0, bindings, ctx->Mesa_DXTn);
+                              pTarget, 0, bindings, GL_TRUE);
 
    if (pFormat == PIPE_FORMAT_NONE && !is_renderbuffer) {
       /* try choosing format again, this time without render target bindings */
       pFormat = st_choose_format(st, internalFormat, format, type,
                                  pTarget, 0, PIPE_BIND_SAMPLER_VIEW,
-                                 ctx->Mesa_DXTn);
+                                 GL_TRUE);
    }
 
    if (pFormat == PIPE_FORMAT_NONE) {