diff --git a/sickbeard/helpers.py b/sickbeard/helpers.py
index 44ddae7c..547fdddd 100644
--- a/sickbeard/helpers.py
+++ b/sickbeard/helpers.py
@@ -127,7 +127,7 @@ def replaceExtension(filename, newExt):
 
 def isSyncFile(filename):
     extension = filename.rpartition(".")[2].lower()
-    if extension == '!sync' or extension == 'lftp-pget-status' or extension == 'part':
+    if extension == '!sync' or extension == 'lftp-pget-status' or extension == 'part' or extension == 'bts':
         return True
     else:
         return False