diff --git a/openevolve/database.py b/openevolve/database.py
index a1f793cc..1c7f7393 100644
--- a/openevolve/database.py
+++ b/openevolve/database.py
@@ -985,7 +985,7 @@ def _llm_judge_novelty(self, program: Program, similar_program: Program) -> bool
         try:
             content: str = asyncio.run(
                 self.novelty_llm.generate_with_context(
-                    system_msg=NOVELTY_SYSTEM_MSG,
+                    system_message=NOVELTY_SYSTEM_MSG,
                     messages=[{"role": "user", "content": user_msg}],
                 )
             )