diff --git a/include/wx/msw/missing.h b/include/wx/msw/missing.h
index cf63f3ec4f..631006ba34 100644
--- a/include/wx/msw/missing.h
+++ b/include/wx/msw/missing.h
@@ -159,10 +159,20 @@ typedef struct tagNMLVDISPINFOW {
 #endif
 #endif
 
-#ifndef HDN_GETDISPINFOW
+#if defined(__GNUWIN32__) && !defined(HDN_GETDISPINFOW)
 #define HDN_GETDISPINFOW (HDN_FIRST-29)
+typedef struct {
+        NMHDR hdr;
+        int iItem;
+        UINT mask;
+        LPWSTR pszText;
+        int cchTextMax;
+        int iImage;
+        LPARAM lParam;
+} NMHDDISPINFOW, *LPNMHDDISPINFOW;
 #endif
 
+
 // ----------------------------------------------------------------------------
 // MS HTML Help
 // ----------------------------------------------------------------------------