diff --git a/x/feemarket/types/codec.go b/x/feemarket/types/codec.go
new file mode 100644
index 0000000..2269b95
--- /dev/null
+++ b/x/feemarket/types/codec.go
@@ -0,0 +1,25 @@
+package types
+
+import (
+	"github.com/cosmos/cosmos-sdk/codec"
+	"github.com/cosmos/cosmos-sdk/codec/legacy"
+	"github.com/cosmos/cosmos-sdk/codec/types"
+	sdk "github.com/cosmos/cosmos-sdk/types"
+	"github.com/cosmos/cosmos-sdk/types/msgservice"
+)
+
+// RegisterLegacyAminoCodec registers the necessary x/feemarket interfaces (messages) on the
+// provided LegacyAmino codec.
+func RegisterLegacyAminoCodec(cdc *codec.LegacyAmino) {
+	legacy.RegisterAminoMsg(cdc, &MsgParams{}, "feemarket/MsgParams")
+}
+
+// RegisterInterfaces registers the x/feemarket interfaces (messages + msg server) on the
+// provided InterfaceRegistry.
+func RegisterInterfaces(registry types.InterfaceRegistry) {
+	registry.RegisterImplementations((*sdk.Msg)(nil),
+		&MsgParams{},
+	)
+
+	msgservice.RegisterMsgServiceDesc(registry, &_Msg_serviceDesc)
+}