diff --git a/include/wx/msw/missing.h b/include/wx/msw/missing.h
index 06a4300d9c..47ed38e36a 100644
--- a/include/wx/msw/missing.h
+++ b/include/wx/msw/missing.h
@@ -179,6 +179,10 @@ typedef struct {
 #endif
 #endif
 
+#ifndef LVM_SETUNICODEFORMAT
+#define LVM_SETUNICODEFORMAT 0x2005
+#endif
+
 // ----------------------------------------------------------------------------
 // Toolbar define value missing 
 // ----------------------------------------------------------------------------