diff --git a/x/gov/keeper/proposal.go b/x/gov/keeper/proposal.go
index 043e5b8d..8ae20781 100644
--- a/x/gov/keeper/proposal.go
+++ b/x/gov/keeper/proposal.go
@@ -37,7 +37,7 @@ func (keeper Keeper) SubmitProposal(ctx sdk.Context, messages []sdk.Msg, metadat
 	// Loop through all messages and confirm that each has a handler and the gov module account
 	// as the only signer
 	for _, msg := range messages {
-		strings.Join([]string{msgsStr, sdk.MsgTypeURL(msg)}, ",")
+		msgsStr = strings.Join([]string{msgsStr, sdk.MsgTypeURL(msg)}, ",")
 
 		// perform a basic validation of the message
 		if err := msg.ValidateBasic(); err != nil {