diff --git a/src/plugins/platforms/windows/qplatformfunctions_wince.h b/src/plugins/platforms/windows/qplatformfunctions_wince.h
index b04c359736..d8905f1569 100644
--- a/src/plugins/platforms/windows/qplatformfunctions_wince.h
+++ b/src/plugins/platforms/windows/qplatformfunctions_wince.h
@@ -176,6 +176,10 @@
 #define VREFRESH 116
 #endif
 
+#ifndef SM_SWAPBUTTON
+#define SM_SWAPBUTTON 23
+#endif
+
 // application defines
 #define SPI_SETNONCLIENTMETRICS 72
 #define SPI_SETICONTITLELOGFONT 0x0022