1 files changed, 3 insertions, 0 deletions

diff --git a/src/config.in b/src/config.in
index 144d6e4e1f8..a0c2f29a0f7 100644
--- a/src/config.in
+++ b/src/config.in
@@ -47,6 +47,9 @@ and this notice must be preserved on all copies.  */
    Otherwise, Emacs expects to use version 10.  */
 #undef HAVE_X11
 
+/* Define if using an X toolkit.  */
+#undef USE_X_TOOLKIT
+
 /* Define this if you're using XFree386.  */
 #undef HAVE_XFREE386