diff --git a/src/class_receiveDataThread.py b/src/class_receiveDataThread.py
index f53aec1e..53281aca 100644
--- a/src/class_receiveDataThread.py
+++ b/src/class_receiveDataThread.py
@@ -479,7 +479,7 @@ class receiveDataThread(threading.Thread):
                         payload, = row
                     self.sendObject(payload)
                 else:
-                    logger.warning('%s asked for an object with a getdata which is not in either our memory inventory or our SQL inventory. We probably cleaned it out after advertising it but before they got around to asking for it.' % self.peer)
+                    logger.warning('%s asked for an object with a getdata which is not in either our memory inventory or our SQL inventory. We probably cleaned it out after advertising it but before they got around to asking for it.' % (self.peer,))
 
     # Our peer has requested (in a getdata message) that we send an object.
     def sendObject(self, payload):