diff --git a/noblogsmv/noblogs_map_diff.py b/noblogsmv/noblogs_map_diff.py
index 8dde0df3cb863a3d3293a37fdf28130049f4be10..a9b41c1b70714af8217bdfac01971f5e61ddf00a 100644
--- a/noblogsmv/noblogs_map_diff.py
+++ b/noblogsmv/noblogs_map_diff.py
@@ -11,6 +11,7 @@ import sys
 
 from noblogsmv import state
 
+log = logging.getLogger('maps-diff')
 
 MYSQL_URI_RE = re.compile(
     r'^(\d+)\s+\S+\s+mysql://([^:]+):([^@]+)@([^:]+):(\d+)/(\S+)')