diff --git a/baseapp/abci_utils.go b/baseapp/abci_utils.go
index 5ec363b1f0e6..93bcbc806c0d 100644
--- a/baseapp/abci_utils.go
+++ b/baseapp/abci_utils.go
@@ -289,7 +289,7 @@ func (h *DefaultProposalHandler) PrepareProposalHandler() sdk.PrepareProposalHan
 		var (
 			err             error
 			selectedTxsNums int
-			invalidTxs      []sdk.Tx // invalid txs to be removed after the iteration
+			invalidTxs      []sdk.Tx // invalid txs to be removed out of the loop to avoid dead lock
 		)
 		h.mempool.SelectBy(ctx, req.Txs, func(memTx sdk.Tx) bool {
 			var signerData []mempool.SignerData