diff --git a/index/store/moss/store.go b/index/store/moss/store.go
index d0676412..a7aa4d41 100644
--- a/index/store/moss/store.go
+++ b/index/store/moss/store.go
@@ -175,14 +175,15 @@ func New(mo store.MergeOperator, config map[string]interface{}) (
 }
 
 func (s *Store) Close() error {
-	if v, ok := s.config["mossAbortCloseEnabled"]; ok && v.(bool) == true {
-		if msw, ok := s.llstore.(*mossStoreWrapper); ok {
-			if s := msw.Actual(); s != nil {
-				_ = s.CloseEx(moss.StoreCloseExOptions{Abort: true})
+	if val, ok := s.config["mossAbortCloseEnabled"]; ok {
+		if v, ok := val.(bool); ok && v {
+			if msw, ok := s.llstore.(*mossStoreWrapper); ok {
+				if s := msw.Actual(); s != nil {
+					_ = s.CloseEx(moss.StoreCloseExOptions{Abort: true})
+				}
 			}
 		}
 	}
-
 	return s.ms.Close()
 }