diff --git a/server/server.py b/server/server.py
index 0e1b6c97..a0824f1d 100644
--- a/server/server.py
+++ b/server/server.py
@@ -379,7 +379,7 @@ class Server:
 				try:
 					handler.flush()
 					handler.close()
-				except ValueError:
+				except (ValueError, KeyError):
 					if sys.version_info >= (2,6):
 						raise
 					# is known to be thrown after logging was shutdown once