diff --git a/include/wx/os2/private.h b/include/wx/os2/private.h
index 2dd674aeed..1c83c9da7e 100644
--- a/include/wx/os2/private.h
+++ b/include/wx/os2/private.h
@@ -18,6 +18,7 @@
 #define INCL_PM
 #define INCL_GPI
 #define INCL_WINSYS
+#define INCL_SHLERRORS
 #include <os2.h>
 
 class WXDLLEXPORT wxFont;