1 files changed, 1 insertions, 1 deletions
diff --git a/gui.h b/gui.h
index 3a5938a0b..7a4d4f4d8 100644
--- a/gui.h
+++ b/gui.h
@@ -126,7 +126,7 @@ extern const byte _fios_colors[];
 
 /* network gui */
 void ShowNetworkGameWindow(void);
-void ShowChatWindow(StringID str, StringID caption, int maxlen, int maxwidth, byte window_class, uint16 window_number);
+void ShowChatWindow(StringID str, StringID caption, int maxlen, int maxwidth, WindowClass window_class, WindowNumber window_number);
 
 /* bridge_gui.c */
 void ShowBuildBridgeWindow(uint start, uint end, byte type);