1 files changed, 4 insertions, 0 deletions
diff --git a/wtree.c b/wtree.c
index e36c3b8..b53b024 100644
--- a/wtree.c
+++ b/wtree.c
@@ -23,6 +23,10 @@ used in advertising or otherwise to promote the sale, use or other dealings
 in this Software without prior written authorization from The Open Group.
  */
 
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
 #include <stdio.h>
 #include <X11/Intrinsic.h>
 #include <X11/Xutil.h>