diff --git a/configure.ac b/configure.ac
index 8ddd98c4a..6cb98d5e8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -322,8 +322,6 @@ AS_IF([test "x$enable_x11" = "xyes"],
                            BACKEND_PC_FILES_PRIVATE="$BACKEND_PC_FILES_PRIVATE pangoft2"
                          ],
                          [])
-
-        AC_DEFINE([HAVE_CLUTTER_GLX], [1], [Have the GLX backend])
       ])
 
 AS_IF([test "x$enable_gdk" = "xyes"],