diff --git a/cmd/ft/chain.go b/cmd/ft/chain.go
index d5d189a5..5fdcda98 100644
--- a/cmd/ft/chain.go
+++ b/cmd/ft/chain.go
@@ -63,7 +63,7 @@ func pruneState(arg string) error {
 	}
 
 	result := new(types.BlockState)
-	clientCall(ipcEndpoint, &result, "ft_setStatePruning", enable)
+	clientCall(ipcEndpoint, &result, "bc_setStatePruning", enable)
 	printJSON(result)
 	return nil
 }
diff --git a/rpcapi/backend.go b/rpcapi/backend.go
index dfcac80b..9a1d208c 100644
--- a/rpcapi/backend.go
+++ b/rpcapi/backend.go
@@ -102,7 +102,7 @@ func GetAPIs(apiBackend Backend) []rpc.API {
 			Service:   NewPrivateTxPoolAPI(apiBackend),
 		},
 		{
-			Namespace: "ft",
+			Namespace: "bc",
 			Version:   "1.0",
 			Service:   NewPrivateBlockChainAPI(apiBackend),
 		},