diff --git a/schema/compose-spec.json b/schema/compose-spec.json
index f2dc22ad..1da7f228 100644
--- a/schema/compose-spec.json
+++ b/schema/compose-spec.json
@@ -320,7 +320,8 @@
                             "^.+$": {"type": ["string", "number"]}
                           }
                         },
-                        "priority": {"type": "number"}
+                        "priority": {"type": "number"},
+                        "gw_priority": {"type": "number"}
                       },
                       "additionalProperties": false,
                       "patternProperties": {"^x-": {}}
diff --git a/types/types.go b/types/types.go
index 83ad830e..4c7baa46 100644
--- a/types/types.go
+++ b/types/types.go
@@ -438,13 +438,14 @@ type PlacementPreferences struct {
 
 // ServiceNetworkConfig is the network configuration for a service
 type ServiceNetworkConfig struct {
-	Priority     int      `yaml:"priority,omitempty" json:"priority,omitempty"`
-	Aliases      []string `yaml:"aliases,omitempty" json:"aliases,omitempty"`
-	Ipv4Address  string   `yaml:"ipv4_address,omitempty" json:"ipv4_address,omitempty"`
-	Ipv6Address  string   `yaml:"ipv6_address,omitempty" json:"ipv6_address,omitempty"`
-	LinkLocalIPs []string `yaml:"link_local_ips,omitempty" json:"link_local_ips,omitempty"`
-	MacAddress   string   `yaml:"mac_address,omitempty" json:"mac_address,omitempty"`
-	DriverOpts   Options  `yaml:"driver_opts,omitempty" json:"driver_opts,omitempty"`
+	Priority        int      `yaml:"priority,omitempty" json:"priority,omitempty"`
+	GatewayPriority int      `yaml:"gw_priority,omitempty" json:"gw_priority,omitempty"`
+	Aliases         []string `yaml:"aliases,omitempty" json:"aliases,omitempty"`
+	Ipv4Address     string   `yaml:"ipv4_address,omitempty" json:"ipv4_address,omitempty"`
+	Ipv6Address     string   `yaml:"ipv6_address,omitempty" json:"ipv6_address,omitempty"`
+	LinkLocalIPs    []string `yaml:"link_local_ips,omitempty" json:"link_local_ips,omitempty"`
+	MacAddress      string   `yaml:"mac_address,omitempty" json:"mac_address,omitempty"`
+	DriverOpts      Options  `yaml:"driver_opts,omitempty" json:"driver_opts,omitempty"`
 
 	Extensions Extensions `yaml:"#extensions,inline,omitempty" json:"-"`
 }