diff --git a/src/mesa/drivers/dri/common/depthtmp.h b/src/mesa/drivers/dri/common/depthtmp.h
index cb3f66fde44..d8b8775ae99 100644
--- a/src/mesa/drivers/dri/common/depthtmp.h
+++ b/src/mesa/drivers/dri/common/depthtmp.h
@@ -64,6 +64,7 @@ static void TAG(WriteDepthSpan)( GLcontext *ctx,
    HW_WRITE_UNLOCK();
 }
 
+#if !HAVE_HW_DEPTH_SPANS
 static void TAG(WriteMonoDepthSpan)( GLcontext *ctx,
                                  GLuint n, GLint x, GLint y,
 				 const GLdepth depth,
@@ -99,6 +100,7 @@ static void TAG(WriteMonoDepthSpan)( GLcontext *ctx,
       }
    HW_WRITE_UNLOCK();
 }
+#endif
 
 static void TAG(WriteDepthPixels)( GLcontext *ctx,
 				   GLuint n,