diff --git a/.gitattributes b/.gitattributes
index 6406b1d10234fdbdd0e6659c579a05a7024c2882..493465e3e524caf3d048e85715b6a80b24ab705a 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -465,6 +465,7 @@ testfont binary
 /src/post_modules/GL/auto.c.in foreign_ident
 /src/post_modules/GL/configure.in foreign_ident
 /src/post_modules/GL/top.c foreign_ident
+/src/post_modules/GTK/acconfig.h foreign_ident
 /src/post_modules/GTK/aclocal.m4 foreign_ident
 /src/post_modules/GTK/dummy.c foreign_ident
 /src/post_modules/Makefile.in foreign_ident
diff --git a/src/post_modules/GTK/acconfig.h b/src/post_modules/GTK/acconfig.h
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..d8f9f6e4fb7fc55f682ab366d211f99b230c0747 100644
--- a/src/post_modules/GTK/acconfig.h
+++ b/src/post_modules/GTK/acconfig.h
@@ -0,0 +1,4 @@
+/* $Id: acconfig.h,v 1.2 1999/11/08 21:48:30 grubba Exp $ */
+
+/* Define this to get prototypes from X's header-files */
+#undef FUNCPROTO