diff --git a/samples/layout/layout.cpp b/samples/layout/layout.cpp
index da5a8580b5..3cd1269b08 100644
--- a/samples/layout/layout.cpp
+++ b/samples/layout/layout.cpp
@@ -30,6 +30,7 @@
 #include "wx/statline.h"
 #include "wx/notebook.h"
 #include "wx/spinctrl.h"
+#include "wx/wrapsizer.h"
 
 #include "layout.h"