diff --git a/torsniff.go b/torsniff.go
index 3885f8c..69c45b3 100644
--- a/torsniff.go
+++ b/torsniff.go
@@ -201,7 +201,7 @@ func (t *torsniff) saveTorrent(infohashHex string, data []byte) error {
 		return err
 	}
 
-	f, err := fileutil.TryLockFile(name, os.O_RDWR|os.O_CREATE, 0755)
+	f, err := fileutil.TryLockFile(name, os.O_WRONLY|os.O_CREATE, 0755)
 	if err != nil {
 		return err
 	}