diff --git a/src/neo4j/_async/io/_bolt.py b/src/neo4j/_async/io/_bolt.py
index 28472ecd..1af01ba8 100644
--- a/src/neo4j/_async/io/_bolt.py
+++ b/src/neo4j/_async/io/_bolt.py
@@ -837,7 +837,7 @@ async def _set_defunct(self, message, error=None, silent=False):
         user_cancelled = isinstance(error, asyncio.CancelledError)
 
         if error:
-            log.debug("[#%04X] _: <CONNECTION> error: %r", self.local_port,
+            log.debug("[#%04X]  _: <CONNECTION> error: %r", self.local_port,
                       error)
         if not user_cancelled:
             log.error(message)
diff --git a/src/neo4j/_sync/io/_bolt.py b/src/neo4j/_sync/io/_bolt.py
index f2b97e58..f8e02651 100644
--- a/src/neo4j/_sync/io/_bolt.py
+++ b/src/neo4j/_sync/io/_bolt.py
@@ -837,7 +837,7 @@ def _set_defunct(self, message, error=None, silent=False):
         user_cancelled = isinstance(error, asyncio.CancelledError)
 
         if error:
-            log.debug("[#%04X] _: <CONNECTION> error: %r", self.local_port,
+            log.debug("[#%04X]  _: <CONNECTION> error: %r", self.local_port,
                       error)
         if not user_cancelled:
             log.error(message)