diff --git a/Source/monster.cpp b/Source/monster.cpp
index e03187cf5..0ab420047 100644
--- a/Source/monster.cpp
+++ b/Source/monster.cpp
@@ -1855,9 +1855,17 @@ void M_StartFadein(int i, int md, BOOL backwards)
 void M_StartFadeout(int i, int md, BOOL backwards)
 {
 	if ((DWORD)i >= MAXMONSTERS)
+#ifdef HELLFIRE
+		return;
+#else
 		app_fatal("M_StartFadeout: Invalid monster %d", i);
+#endif
 	if (monster[i].MType == NULL)
+#ifdef HELLFIRE
+		return;
+#else
 		app_fatal("M_StartFadeout: Monster %d \"%s\" MType NULL", i, monster[i].mName);
+#endif
 
 	NewMonsterAnim(i, &monster[i].MType->Anims[MA_SPECIAL], md);
 	monster[i]._mmode = MM_FADEOUT;