1 files changed, 3 insertions, 2 deletions
diff --git a/sort.go b/sort.go
index eb2defa..d60ebb8 100644
--- a/sort.go
+++ b/sort.go
@@ -191,9 +191,10 @@ func (pf *File) appendUnique(w io.Writer, blah *MsgName, names map[string]string
 	var LOCK string = pf.Bases.Lockname
 
 	if argv.Mutex {
-		LOCK = pf.Bases.Lockname
-	} else {
+		// use the mutex lock from the modified protoc.pb.go file
 		LOCK = "all.Lock"
+	} else {
+		LOCK = pf.Bases.Lockname
 	}
 
 	fmt.Fprintln(w, "// enforces "+BASE+" is unique")