diff --git a/src/api/in_game.lua b/src/api/in_game.lua
index 26f6408..b1d634f 100755
--- a/src/api/in_game.lua
+++ b/src/api/in_game.lua
@@ -175,7 +175,7 @@ function arena_lib.load_celebration(mod, arena, winner_name)
 
   -- se era già in celebrazione
   if arena.in_celebration then
-    minetest.log("error", "[" .. mod .. "] There was an attempt to call the celebration phase while already in it. This shall not be done, aborting...")
+    minetest.log("error", debug.traceback("[" .. mod .. "] There was an attempt to call the celebration phase while already in it. This shall not be done, aborting..."))
     return end
 
   arena.in_celebration = true