diff --git a/src/vllm_tgis_adapter/grpc/grpc_server.py b/src/vllm_tgis_adapter/grpc/grpc_server.py
index 15960677..17787889 100644
--- a/src/vllm_tgis_adapter/grpc/grpc_server.py
+++ b/src/vllm_tgis_adapter/grpc/grpc_server.py
@@ -195,8 +195,8 @@ async def post_init(self) -> None:
         assert self.tokenizer is not None
 
         # Swap in the special TGIS stats logger
-        assert hasattr(self.engine.engine, "stat_logger")
-        assert self.engine.engine.stat_logger
+        assert hasattr(self.engine.engine, "stat_loggers")
+        assert self.engine.engine.stat_loggers
 
         vllm_stat_logger = self.engine.engine.stat_loggers["prometheus"]
         tgis_stats_logger = TGISStatLogger(