diff --git a/manager/manager.go b/manager/manager.go
index 30cd9ff4..c0adef44 100644
--- a/manager/manager.go
+++ b/manager/manager.go
@@ -847,7 +847,7 @@ func (self *manager) watchForNewContainers(quit chan error) error {
 					err = self.destroyContainer(event.Name)
 				}
 				if err != nil {
-					glog.Warning("Failed to process watch event: %v", err)
+					glog.Warningf("Failed to process watch event: %v", err)
 				}
 			case <-quit:
 				// Stop processing events if asked to quit.