diff --git a/src/menu/doommenu.cpp b/src/menu/doommenu.cpp
index c2dab0a4e1..e28eebc10c 100644
--- a/src/menu/doommenu.cpp
+++ b/src/menu/doommenu.cpp
@@ -83,7 +83,7 @@ extern bool hud_toggled;
 FNewGameStartup NewGameStartupInfo;
 
 
-bool M_SetSpecialMenu(FName menu, int param)
+bool M_SetSpecialMenu(FName& menu, int param)
 {
 	// some menus need some special treatment
 	switch (menu.GetIndex())
diff --git a/src/menu/menu.cpp b/src/menu/menu.cpp
index 0bac3a57d4..62cfc482af 100644
--- a/src/menu/menu.cpp
+++ b/src/menu/menu.cpp
@@ -416,7 +416,7 @@ DEFINE_ACTION_FUNCTION(DMenu, ActivateMenu)
 //
 //=============================================================================
 
-bool M_SetSpecialMenu(FName menu, int param);	// game specific checks
+bool M_SetSpecialMenu(FName& menu, int param);	// game specific checks
 
 void M_SetMenu(FName menu, int param)
 {