diff --git a/src/OpenDis.c b/src/OpenDis.c
index 47f98926..121291b5 100644
--- a/src/OpenDis.c
+++ b/src/OpenDis.c
@@ -35,7 +35,7 @@ in this Software without prior written authorization from The Open Group.
 #include <X11/Xtrans/Xtrans.h>
 #include <X11/Xatom.h>
 #include <X11/Xresource.h>
-#include "bigreqstr.h"
+#include <X11/extensions/bigreqstr.h>
 #include <stdio.h>
 #include "Xintconn.h"