diff --git a/models/repo.go b/models/repo.go
index 5fdc248de..ca592a8d0 100644
--- a/models/repo.go
+++ b/models/repo.go
@@ -1852,6 +1852,9 @@ func DeleteRepository(doer *User, uid, repoID int64) error {
 		if _, err = sess.In("issue_id", issueIDs).Delete(&IssueWatch{}); err != nil {
 			return err
 		}
+		if _, err = sess.In("issue_id", issueIDs).Delete(&Stopwatch{}); err != nil {
+			return err
+		}
 
 		attachments := make([]*Attachment, 0, 5)
 		if err = sess.