diff --git a/src/luascript.cpp b/src/luascript.cpp
index 05ccd2ff..e10b9bef 100644
--- a/src/luascript.cpp
+++ b/src/luascript.cpp
@@ -3010,6 +3010,7 @@ void LuaScriptInterface::registerFunctions()
 	registerMetaMethod("MonsterType", "__eq", LuaScriptInterface::luaUserdataCompare);
 
 	registerMethod("MonsterType", "isAttackable", LuaScriptInterface::luaMonsterTypeIsAttackable);
+	registerMethod("MonsterType", "isRewardBoss", LuaScriptInterface::luaMonsterTypeIsRewardBoss);
 	registerMethod("MonsterType", "isChallengeable", LuaScriptInterface::luaMonsterTypeIsChallengeable);
 	registerMethod("MonsterType", "isConvinceable", LuaScriptInterface::luaMonsterTypeIsConvinceable);
 	registerMethod("MonsterType", "isSummonable", LuaScriptInterface::luaMonsterTypeIsSummonable);
@@ -14729,6 +14730,18 @@ int LuaScriptInterface::luaMonsterTypeIsAttackable(lua_State* L)
 	return 1;
 }
 
+int LuaScriptInterface::luaMonsterTypeIsRewardBoss(lua_State* L)
+{
+	// lua monsterType:isRewardBoss()
+	MonsterType* monsterType = getUserdata<MonsterType>(L, 1);
+	if (monsterType) {
+		pushBoolean(L, monsterType->info.isRewardBoss);
+	} else {
+		lua_pushnil(L);
+	}
+	return 1;
+}
+
 int LuaScriptInterface::luaMonsterTypeIsChallengeable(lua_State* L)
 {
 	// get: monsterType:isChallengeable() set: monsterType:isChallengeable(bool)
diff --git a/src/luascript.h b/src/luascript.h
index 37117dad..33820be5 100644
--- a/src/luascript.h
+++ b/src/luascript.h
@@ -1423,6 +1423,7 @@ class LuaScriptInterface
 		static int luaMonsterTypeCreate(lua_State* L);
 
 		static int luaMonsterTypeIsAttackable(lua_State* L);
+		static int luaMonsterTypeIsRewardBoss(lua_State* L);
 		static int luaMonsterTypeIsChallengeable(lua_State* L);
 		static int luaMonsterTypeIsConvinceable(lua_State* L);
 		static int luaMonsterTypeIsSummonable(lua_State* L);