diff --git a/src/logic/scripting/lua/libs/libutf8.cpp b/src/logic/scripting/lua/libs/libutf8.cpp
index 8d0628f0..85895c5d 100644
--- a/src/logic/scripting/lua/libs/libutf8.cpp
+++ b/src/logic/scripting/lua/libs/libutf8.cpp
@@ -25,6 +25,7 @@ static int l_tobytes(lua::State* L) {
 
 static int l_tostring(lua::State* L) {
     if (lua::istable(L, 1)) {
+        lua::pushvalue(L, 1);
         size_t size = lua::objlen(L, 1);
         util::Buffer<char> buffer(size);
         for (size_t i = 0; i < size; i++) {
@@ -32,6 +33,7 @@ static int l_tostring(lua::State* L) {
             buffer[i] = lua::tointeger(L, -1);
             lua::pop(L);
         }
+        lua::pop(L);
         return lua::pushlstring(L, buffer.data(), size);
     } else if (auto bytes = lua::touserdata<lua::LuaBytearray>(L, 1)) {
         return lua::pushstring(