1 files changed, 1 insertions, 1 deletions

diff --git a/src/tools.cpp b/src/tools.cpp
index 89e5499..52c70bc 100644
--- a/src/tools.cpp
+++ b/src/tools.cpp
@@ -632,7 +632,7 @@ static lua_Integer get_mt_id( Universe* U, lua_State* L, int i)
 
     if( id == 0)
     {
-        id = U->last_mt_id.fetch_add(1, std::memory_order_relaxed);
+        id = U->next_mt_id.fetch_add(1, std::memory_order_relaxed);
 
         /* Create two-way references: id_uint <-> table
         */