diff --git a/glsl_types.h b/glsl_types.h
index 57f339a9a6f..b1cd9a9d637 100644
--- a/glsl_types.h
+++ b/glsl_types.h
@@ -167,6 +167,14 @@ struct glsl_type {
       return (matrix_rows > 0) && (base_type == GLSL_TYPE_FLOAT);
    }
 
+   /**
+    * Query whether or not a type is a sampler
+    */
+   bool is_sampler() const
+   {
+      return base_type == GLSL_TYPE_SAMPLER;
+   }
+
    /**
     * Query whether or not a type is the void type singleton.
     */