diff --git a/src/p_setup.c b/src/p_setup.c
index 38f7503ac..c8b0936b8 100644
--- a/src/p_setup.c
+++ b/src/p_setup.c
@@ -8146,7 +8146,7 @@ static boolean P_LoadAddon(UINT16 numlumps)
 		ST_Start();
 
 	// Prevent savefile cheating
-	if (cursaveslot > 0)
+	if (modifiedgame && (cursaveslot > 0))
 		cursaveslot = 0;
 
 	if (replacedcurrentmap && gamestate == GS_LEVEL && (netgame || multiplayer))