diff --git a/enums.h b/enums.h
index b397d4ef1..591dc36b8 100644
--- a/enums.h
+++ b/enums.h
@@ -1745,10 +1745,33 @@ typedef enum _monster_id {
 	MT_ADVOCATE = 0x6C,
 	MT_GOLEM    = 0x6D,
 	MT_DIABLO   = 0x6E,
-	MT_DARKMAGE = 0x6F,
 #ifdef HELLFIRE
+	MT_DARKMAGE = 0x6F, /* not counted in enum in vanilla */
+	MT_HELLBOAR = 0x70,
+	MT_STINGER  = 0x71,
+	MT_PSYCHORB = 0x72,
+	MT_ARACHNON = 0x73,
+	MT_FELLTWIN = 0x74,
+	MT_HORKSPWN = 0x75,
+	MT_VENMTAIL = 0x76,
+	MT_NECRMORB = 0x77,
+	MT_SPIDLORD = 0x78,
+	MT_LASHWORM = 0x79,
+	MT_TORCHANT = 0x7A,
 	MT_HORKDMN  = 0x7B,
 	MT_DEFILER  = 0x7C,
+	MT_GRAVEDIG = 0x7D,
+	MT_TOMBRAT  = 0x7E,
+	MT_FIREBAT  = 0x7F,
+	MT_SKLWING  = 0x80,
+	MT_LICH     = 0x81,
+	MT_CRYPTDMN = 0x82,
+	MT_HELLBAT  = 0x83,
+	MT_BONEDEMN = 0x84,
+	MT_ARCHLICH = 0x85,
+	MT_BICLOPS  = 0x86,
+	MT_FLESTHNG = 0x87,
+	MT_REAPER   = 0x88,
 	MT_NAKRUL   = 0x89,
 #endif
 	NUM_MTYPES,