diff --git a/src/mesa/shader/slang/slang_execute.c b/src/mesa/shader/slang/slang_execute.c
index e45d2a4bc27..d47f3eaca24 100644
--- a/src/mesa/shader/slang/slang_execute.c
+++ b/src/mesa/shader/slang/slang_execute.c
@@ -192,10 +192,13 @@ int _slang_execute (const slang_assembly_file *file)
 	mach.exit = 0;
 
 	/* assume 32-bit machine */
+	/* XXX why???, disabling the pointer size assertions here.
+	 * See bug 4021.
+	 */
 	static_assert(sizeof (GLfloat) == 4);
-	static_assert(sizeof (GLfloat *) == 4);
+	/*static_assert(sizeof (GLfloat *) == 4);*/
 	static_assert(sizeof (GLuint) == 4);
-	static_assert(sizeof (GLuint *) == 4);
+	/*static_assert(sizeof (GLuint *) == 4);*/
 
 	dump (file);