diff --git a/Script/cs/Threads/DeleteThread.py b/Script/cs/Threads/DeleteThread.py
index 5ba965e75949c976e31c98736b215819ac9d1385..8d3a3df254a7ea358c3797db16e474e9adf3afb1 100644
--- a/Script/cs/Threads/DeleteThread.py
+++ b/Script/cs/Threads/DeleteThread.py
@@ -261,7 +261,7 @@ class DeleteThread(threading.Thread):
                 continue
 
             if stats.f_bsize == 0 or stats.f_blocks == 0:
-                self.logger.error('statvfs error on %s: stats=', mountpoint, str(stats))
+                self.logger.error('statvfs error on %s: stats=%s', mountpoint, str(stats))
                 continue
 
             fs_usages[mountpoint] = 100. * (1 -