diff --git a/proc_master.go b/proc_master.go
index 3d2686a..a991c60 100644
--- a/proc_master.go
+++ b/proc_master.go
@@ -90,11 +90,13 @@ func (mp *master) checkBinary() error {
 	mp.binHash = hash.Sum(nil)
 	f.Close()
 	//test bin<->tmpbin moves
-	if err := move(tmpBinPath, mp.binPath); err != nil {
-		return fmt.Errorf("cannot move binary (%s)", err)
-	}
-	if err := move(mp.binPath, tmpBinPath); err != nil {
-		return fmt.Errorf("cannot move binary back (%s)", err)
+	if mp.Config.Fetcher != nil {
+		if err := move(tmpBinPath, mp.binPath); err != nil {
+			return fmt.Errorf("cannot move binary (%s)", err)
+		}
+		if err := move(mp.binPath, tmpBinPath); err != nil {
+			return fmt.Errorf("cannot move binary back (%s)", err)
+		}
 	}
 	return nil
 }