diff --git a/src/post_modules/GTK/pgtk.h b/src/post_modules/GTK/pgtk.h
index dd6e5c4ce3de0d8ddc3aad4a05f2d8af89628370..8964941bf5a153c359078fc95fac8baa142e0846 100644
--- a/src/post_modules/GTK/pgtk.h
+++ b/src/post_modules/GTK/pgtk.h
@@ -7,7 +7,6 @@
 #include <pike_types.h>
 #include <interpret.h>
 #include <module_support.h>
-#include <error.h>
 #include <array.h>
 #include <backend.h>
 #include <stralloc.h>