diff --git a/x/auth/client/rest/sign.go b/x/auth/client/rest/sign.go
index a83e7be7d0..4d2bd028c5 100644
--- a/x/auth/client/rest/sign.go
+++ b/x/auth/client/rest/sign.go
@@ -37,7 +37,7 @@ func SignTxRequestHandlerFn(cdc *codec.Codec, cliCtx context.CLIContext) http.Ha
 
 		// validate tx
 		// discard error if it's CodeUnauthorized as the tx comes with no signatures
-		if err := m.Tx.ValidateBasic(); err != nil && err.Code() != sdk.CodeUnauthorized {
+		if err := m.Tx.ValidateBasic(); err != nil && err.Code() != sdk.CodeNoSignatures {
 			utils.WriteErrorResponse(w, http.StatusBadRequest, err.Error())
 			return
 		}