diff --git a/src/gallium/drivers/radeonsi/gfx10_shader_ngg.c b/src/gallium/drivers/radeonsi/gfx10_shader_ngg.c
index 6239b1ba466..419a4021943 100644
--- a/src/gallium/drivers/radeonsi/gfx10_shader_ngg.c
+++ b/src/gallium/drivers/radeonsi/gfx10_shader_ngg.c
@@ -60,7 +60,7 @@ static LLVMValueRef ngg_get_prim_cnt(struct si_shader_context *ctx)
 
 static LLVMValueRef ngg_get_ordered_id(struct si_shader_context *ctx)
 {
-	return si_unpack_param(ctx, ctx->gs_tg_info, 0, 11);
+	return si_unpack_param(ctx, ctx->gs_tg_info, 0, 12);
 }
 
 static LLVMValueRef ngg_get_query_buf(struct si_shader_context *ctx)
diff --git a/src/gallium/drivers/radeonsi/si_shader_internal.h b/src/gallium/drivers/radeonsi/si_shader_internal.h
index ed46d8efe4b..a9b40f41b4c 100644
--- a/src/gallium/drivers/radeonsi/si_shader_internal.h
+++ b/src/gallium/drivers/radeonsi/si_shader_internal.h
@@ -181,7 +181,7 @@ struct si_shader_context {
 	struct ac_arg es2gs_offset;
 	/* HW GS */
 	/* On gfx10:
-	 *  - bits 0..10: ordered_wave_id
+	 *  - bits 0..11: ordered_wave_id
 	 *  - bits 12..20: number of vertices in group
 	 *  - bits 22..30: number of primitives in group
 	 */