diff --git a/tests/misc/module.cpp b/tests/misc/module.cpp
index e41c713bea..320011fd25 100644
--- a/tests/misc/module.cpp
+++ b/tests/misc/module.cpp
@@ -18,6 +18,7 @@
 #endif
 
 #include "wx/module.h"
+#include "wx/wxcrt.h"       // for wxStrcat()
 
 // ----------------------------------------------------------------------------
 // test classes derived from wxModule