diff --git a/internal/proxy/meta_cache.go b/internal/proxy/meta_cache.go
index 7858850958..9e55c1d170 100644
--- a/internal/proxy/meta_cache.go
+++ b/internal/proxy/meta_cache.go
@@ -71,6 +71,7 @@ type MetaCache struct {
 
 var globalMetaCache Cache
 
+// InitMetaCache initializes globalMetaCache
 func InitMetaCache(client types.RootCoord) error {
 	var err error
 	globalMetaCache, err = NewMetaCache(client)