diff --git a/Source/monstdat.cpp b/Source/monstdat.cpp
index 7947746e2..41a587b8c 100644
--- a/Source/monstdat.cpp
+++ b/Source/monstdat.cpp
@@ -257,6 +257,36 @@ BYTE MonstConvTbl[] = {
 	MT_NZOMBIE,
 	MT_BIGFALL,
 	MT_DARKMAGE,
+	0, // Reserved for Hellfire
+	0, // Reserved for Hellfire
+	0, // Reserved for Hellfire
+	0, // Reserved for Hellfire
+	0, // Reserved for Hellfire
+	0, // Reserved for Hellfire
+	0, // Reserved for Hellfire
+	0, // Reserved for Hellfire
+	0, // Reserved for Hellfire
+	0, // Reserved for Hellfire
+	0, // Reserved for Hellfire
+	0, // Reserved for Hellfire
+	0, // Reserved for Hellfire
+	0, // Reserved for Hellfire
+	0, // Reserved for Hellfire
+	0, // Reserved for Hellfire
+	0, // Reserved for Hellfire
+	0, // Reserved for Hellfire
+	0, // Reserved for Hellfire
+	0, // Reserved for Hellfire
+	0, // Reserved for Hellfire
+	0, // Reserved for Hellfire
+	0, // Reserved for Hellfire
+	0, // Reserved for Hellfire
+	0, // Reserved for Hellfire
+	0, // Reserved for Hellfire
+	0, // Reserved for Hellfire
+	MT_CLEAVER,
+	MT_INVILORD,
+	MT_LRDSAYTR,
 };
 
 #define MAT_NEVER 0
diff --git a/Source/objdat.cpp b/Source/objdat.cpp
index e098dcfe6..0b1082595 100644
--- a/Source/objdat.cpp
+++ b/Source/objdat.cpp
@@ -117,6 +117,41 @@ int ObjTypeConv[] = {
 	OBJ_TORCHR2,
 	OBJ_TORCHL2,
 	OBJ_MUSHPATCH,
+	OBJ_STAND,
+	OBJ_TORCHL,
+	OBJ_TORCHR,
+	OBJ_FLAMELVR,
+	OBJ_SARC,
+	OBJ_BARREL,
+	OBJ_BARRELEX,
+	OBJ_BOOKSHELF,
+	OBJ_BOOKCASEL,
+	OBJ_BOOKCASER,
+	OBJ_ARMORSTAND,
+	OBJ_ARMORSTANDN,
+	OBJ_WEAPONRACK,
+	OBJ_WEAPONRACKN,
+	OBJ_SLAINHERO,
+	OBJ_WATER,
+	OBJ_BLOODFTN,
+	OBJ_PURIFYINGFTN,
+	OBJ_SHRINEL,
+	OBJ_SHRINER,
+	OBJ_GOATSHRINE,
+	OBJ_MURKYFTN,
+	OBJ_TEARFTN,
+	OBJ_DECAP,
+	OBJ_TCHEST2,
+	OBJ_STORYBOOK,
+	OBJ_L1LDOOR,
+	OBJ_L1RDOOR,
+	OBJ_L2LDOOR,
+	OBJ_L2RDOOR,
+	OBJ_L3LDOOR,
+	OBJ_L3RDOOR,
+	OBJ_BLINDBOOK,
+	OBJ_BLOODBOOK,
+	OBJ_LAZSTAND,
 };
 
 /** Contains the data related to each object ID. */