diff --git a/game/game.py b/game/game.py
index 37ea92e..2c21dc0 100644
--- a/game/game.py
+++ b/game/game.py
@@ -56,9 +56,10 @@ class PerfGroup(Group):
         self._name = name
 
     def __del__(self):
-        avg = round(self._total / self._count, 2)
-        print(self._name, "*", self._count,
-            ": min =", round(self._min, 2), ", max =", round(self._max, 2), ", avg =", avg, "(ms)")
+        if self._count:
+            avg = round(self._total / self._count, 2)
+            print(self._name, "*", self._count,
+                ": min =", round(self._min, 2), ", max =", round(self._max, 2), ", avg =", avg, "(ms)")
 
     def draw(self, time):
         begin = thread_time()