diff --git a/core/population.py b/core/population.py
index 2e4e00a..151a368 100644
--- a/core/population.py
+++ b/core/population.py
@@ -818,9 +818,9 @@ def compute_system_rewards(self) -> Dict[str, float]:
             agent_reward = agent.compute_morphology_statistics()
             for k, v in agent_reward.items():
                 reward[k] += v
-            # average
-            for k in agent_reward.keys():
-                agent_reward[k] = agent_reward[k] / len(self.agents)
+        # average
+        for k in reward.keys():
+            reward[k] = reward[k] / len(self.agents)
 
         # Pairwise disagreement across agents' forms
         disagr = 0