diff --git a/cmd/geth/chaincmd.go b/cmd/geth/chaincmd.go
index 35bf576e1d94028e5a902f7f483a4db18dedcc68..85d0c3acaa3153a92d3a2926b4919b120e2cb5e5 100644
--- a/cmd/geth/chaincmd.go
+++ b/cmd/geth/chaincmd.go
@@ -67,6 +67,9 @@ It expects the genesis file as argument.`,
 			utils.DataDirFlag,
 			utils.CacheFlag,
 			utils.LightModeFlag,
+			utils.GCModeFlag,
+			utils.CacheDatabaseFlag,
+			utils.CacheGCFlag,
 		},
 		Category: "BLOCKCHAIN COMMANDS",
 		Description: `