diff --git a/src/mesa/main/extensions.c b/src/mesa/main/extensions.c
index 9522f04ae51..97cfa2658d5 100644
--- a/src/mesa/main/extensions.c
+++ b/src/mesa/main/extensions.c
@@ -204,7 +204,7 @@ _mesa_enable_sw_extensions(GLcontext *ctx)
    ctx->Extensions.ARB_shading_language_100 = GL_TRUE;
 #endif
 #if FEATURE_ARB_shading_language_120
-   ctx->Extensions.ARB_shading_language_120 = GL_FALSE; /* not quite done */
+   ctx->Extensions.ARB_shading_language_120 = GL_TRUE;
 #endif
    ctx->Extensions.ARB_shadow = GL_TRUE;
    ctx->Extensions.ARB_texture_border_clamp = GL_TRUE;
@@ -427,7 +427,7 @@ _mesa_enable_2_1_extensions(GLcontext *ctx)
    ctx->Extensions.EXT_texture_sRGB = GL_TRUE;
 #endif
 #ifdef FEATURE_ARB_shading_language_120
-   ctx->Extensions.ARB_shading_language_120 = GL_FALSE; /* not quite done */
+   ctx->Extensions.ARB_shading_language_120 = GL_TRUE;
 #endif
 }
 
diff --git a/src/mesa/main/getstring.c b/src/mesa/main/getstring.c
index 94bf5de1e8b..e1008d727fa 100644
--- a/src/mesa/main/getstring.c
+++ b/src/mesa/main/getstring.c
@@ -84,7 +84,7 @@ compute_version(const GLcontext *ctx)
                               ctx->Extensions.ARB_texture_non_power_of_two &&
                               ctx->Extensions.EXT_blend_equation_separate);
    const GLboolean ver_2_1 = (ver_2_0 &&
-                              /*ctx->Extensions.ARB_shading_language_120 &&*/
+                              ctx->Extensions.ARB_shading_language_120 &&
                               ctx->Extensions.EXT_pixel_buffer_object &&
                               ctx->Extensions.EXT_texture_sRGB);
    if (ver_2_1)