diff --git a/x/authz/codec.go b/x/authz/codec.go
index d2e43b88316c..ecabef38cd0d 100644
--- a/x/authz/codec.go
+++ b/x/authz/codec.go
@@ -14,6 +14,7 @@ func RegisterLegacyAminoCodec(cdc *codec.LegacyAmino) {
 	legacy.RegisterAminoMsg(cdc, &MsgGrant{}, "cosmos-sdk/MsgGrant")
 	legacy.RegisterAminoMsg(cdc, &MsgRevoke{}, "cosmos-sdk/MsgRevoke")
 	legacy.RegisterAminoMsg(cdc, &MsgExec{}, "cosmos-sdk/MsgExec")
+	legacy.RegisterAminoMsg(cdc, &MsgExecCompat{}, "cosmos-sdk/MsgExecCompat")
 
 	cdc.RegisterInterface((*Authorization)(nil), nil)
 	cdc.RegisterConcrete(&GenericAuthorization{}, "cosmos-sdk/GenericAuthorization", nil)
@@ -25,6 +26,7 @@ func RegisterInterfaces(registry types.InterfaceRegistry) {
 		&MsgGrant{},
 		&MsgRevoke{},
 		&MsgExec{},
+		&MsgExecCompat{},
 	)
 
 	registry.RegisterInterface(
diff --git a/x/authz/msgs.go b/x/authz/msgs.go
index 1721c6c5347c..2d34ac444bc8 100644
--- a/x/authz/msgs.go
+++ b/x/authz/msgs.go
@@ -14,6 +14,7 @@ var (
 	_ sdk.Msg = &MsgGrant{}
 	_ sdk.Msg = &MsgRevoke{}
 	_ sdk.Msg = &MsgExec{}
+	_ sdk.Msg = &MsgExecCompat{}
 
 	_ cdctypes.UnpackInterfacesMessage = &MsgGrant{}
 	_ cdctypes.UnpackInterfacesMessage = &MsgExec{}