diff --git a/io/key/key.go b/io/key/key.go
index 7e5d1d10..ceaea426 100644
--- a/io/key/key.go
+++ b/io/key/key.go
@@ -276,7 +276,7 @@ func (m Modifiers) String() string {
 	if m.Contain(ModSuper) {
 		strs = append(strs, NameSuper)
 	}
-	return strings.Join(strs, "|")
+	return strings.Join(strs, "-")
 }
 
 func (s State) String() string {