diff --git a/src/gui_w48.c b/src/gui_w48.c
index 5649aeb..03b7d71 100644
--- a/src/gui_w48.c
+++ b/src/gui_w48.c
@@ -105,6 +105,7 @@
 typedef int LPWINDOWPOS;
 typedef int LPWORD;
 typedef int LRESULT;
+typedef int HRESULT;
 # undef MSG
 typedef int MSG;
 typedef int NEWTEXTMETRIC;