diff --git a/CreatureMethods.h b/CreatureMethods.h
index e0ddb85..46b0291 100644
--- a/CreatureMethods.h
+++ b/CreatureMethods.h
@@ -983,6 +983,20 @@ auto const& threatlist = creature->getThreatManager().getThreatList();
         return 0;
     }
 
+#if defined(TRINITY) || defined(AZEROTHCORE)
+    /**
+     * Sets the [Creature]'s ReactState to `state`.
+     *
+     * @param [ReactState] state
+     */
+    int SetReactState(lua_State* L, Creature* creature)
+    {
+        uint32 state = Eluna::CHECKVAL<uint32>(L, 2);
+
+        creature->SetReactState((ReactStates)state);
+        return 0;
+    }
+#endif
 
     /**
      * Makes the [Creature] able to fly if enabled.
diff --git a/LuaFunctions.cpp b/LuaFunctions.cpp
index 6d21bf3..d11e8cb 100644
--- a/LuaFunctions.cpp
+++ b/LuaFunctions.cpp
@@ -808,6 +808,9 @@ ElunaRegister<Creature> CreatureMethods[] =
     { "SetLootMode", &LuaCreature::SetLootMode },
 #endif
     { "SetNPCFlags", &LuaCreature::SetNPCFlags },
+#if defined(TRINITY) || AZEROTHCORE
+    { "SetReactState", &LuaCreature::SetReactState },
+#endif
     { "SetDeathState", &LuaCreature::SetDeathState },
     { "SetWalk", &LuaCreature::SetWalk },
     { "SetHomePosition", &LuaCreature::SetHomePosition },