diff --git a/src/motif/textctrl.cpp b/src/motif/textctrl.cpp
index 5e602b8a44..9dbff0adb2 100644
--- a/src/motif/textctrl.cpp
+++ b/src/motif/textctrl.cpp
@@ -25,6 +25,8 @@
 #define XtParent XTPARENT
 #endif
 
+#include "wx/defs.h"
+
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <fstream.h>