diff --git a/gno.land/pkg/sdk/vm/msgs.go b/gno.land/pkg/sdk/vm/msgs.go
index e5616fa2395..d650c23f382 100644
--- a/gno.land/pkg/sdk/vm/msgs.go
+++ b/gno.land/pkg/sdk/vm/msgs.go
@@ -57,7 +57,7 @@ func (msg MsgAddPackage) ValidateBasic() error {
 		return ErrInvalidPkgPath("missing package path")
 	}
 	if !msg.Deposit.IsValid() {
-		return std.ErrTxDecode("invalid deposit")
+		return std.ErrInvalidCoins(msg.Deposit.String())
 	}
 	// XXX validate files.
 	return nil
diff --git a/tm2/pkg/sdk/bank/msgs.go b/tm2/pkg/sdk/bank/msgs.go
index d87656b8b7b..378af29f544 100644
--- a/tm2/pkg/sdk/bank/msgs.go
+++ b/tm2/pkg/sdk/bank/msgs.go
@@ -39,7 +39,7 @@ func (msg MsgSend) ValidateBasic() error {
 		return std.ErrInvalidAddress("missing recipient address")
 	}
 	if !msg.Amount.IsValid() {
-		return std.ErrInvalidCoins("send amount is invalid: " + msg.Amount.String())
+		return std.ErrInvalidCoins(msg.Amount.String())
 	}
 	if !msg.Amount.IsAllPositive() {
 		return std.ErrInsufficientCoins("send amount must be positive")