diff --git a/include/wx/msw/missing.h b/include/wx/msw/missing.h
index ec92260c1d..7d1f8db5c8 100644
--- a/include/wx/msw/missing.h
+++ b/include/wx/msw/missing.h
@@ -652,6 +652,10 @@ typedef struct {
     #define WM_UPDATEUISTATE    0x0128
 #endif
 
+#ifndef WM_PRINTCLIENT
+    #define WM_PRINTCLIENT 0x318
+#endif
+
 #ifndef UIS_INITIALIZE
     #define UIS_INITIALIZE  3
 #endif