diff --git a/demos/gtk-demo/main.c b/demos/gtk-demo/main.c
index 1c04a27040..935b86eeff 100644
--- a/demos/gtk-demo/main.c
+++ b/demos/gtk-demo/main.c
@@ -56,9 +56,6 @@ get_democodedir (void)
 
 #endif
 
-#undef DEMOCODEDIR
-#define DEMOCODEDIR getenv ("GTK_DEMO_DATA_DIR")
-
 /**
  * demo_find_file:
  * @base: base filename