diff --git a/barterdude/hooks/metrics/prometheus/__init__.py b/barterdude/hooks/metrics/prometheus/__init__.py
index 05bcaaa..3ea7e16 100644
--- a/barterdude/hooks/metrics/prometheus/__init__.py
+++ b/barterdude/hooks/metrics/prometheus/__init__.py
@@ -59,7 +59,7 @@ async def _on_complete(self,
         hash_message = id(message)
         labels = self.__labels.copy()
         labels["state"] = state
-        labels["error"] = str(type(error)) if (error) else ""
+        labels["error"] = str(type(error)) if error else ""
         self.metrics[self.__definitions.HISTOGRAM_MEASURE].labels(
             **labels).observe(
                 final_time - self._msg_start.pop(hash_message)