diff --git a/openevolve/database.py b/openevolve/database.py
index d39792c0c..691c4f1a2 100644
--- a/openevolve/database.py
+++ b/openevolve/database.py
@@ -1067,8 +1067,8 @@ def _is_novel(self, program_id: int, island_idx: int) -> bool:
             other = self.programs[pid]
 
             if other.embedding is None:
-                logger.log(
-                    "Warning: Program %s has no embedding, skipping similarity check", other.id
+                logger.warning(
+                    f"Program {other.id} has no embedding, skipping similarity check"
                 )
                 continue