diff --git a/baseapp/abci_utils.go b/baseapp/abci_utils.go
index e07d5b19f73..2f0636e75e0 100644
--- a/baseapp/abci_utils.go
+++ b/baseapp/abci_utils.go
@@ -271,9 +271,7 @@ func (h *DefaultProposalHandler) PrepareProposalHandler() sdk.PrepareProposalHan
 				}
 
 				var txGasLimit uint64
-				if gasTx, ok := tx.(interface {
-					GetGas() uint64
-				}); ok {
+				if gasTx, ok := tx.(mempool.GasTx); ok {
 					txGasLimit = gasTx.GetGas()
 				}