diff --git a/src/luascript.cpp b/src/luascript.cpp
index a82fd77b89..366bab2c60 100644
--- a/src/luascript.cpp
+++ b/src/luascript.cpp
@@ -13832,8 +13832,8 @@ int LuaScriptInterface::luaMonsterTypeAddSummon(lua_State* L)
 	if (monsterType) {
 		summonBlock_t summon;
 		summon.name = getString(L, 2);
-		summon.chance = getNumber<int32_t>(L, 3);
-		summon.speed = getNumber<int32_t>(L, 4);
+		summon.speed = getNumber<int32_t>(L, 3);
+		summon.chance = getNumber<int32_t>(L, 4);
 		monsterType->info.summons.push_back(summon);
 		pushBoolean(L, true);
 	} else {