diff --git a/loader/loader_test.go b/loader/loader_test.go
index aed23530..da8ba2d0 100644
--- a/loader/loader_test.go
+++ b/loader/loader_test.go
@@ -1689,6 +1689,7 @@ networks:
 
 	workingDir, err := os.Getwd()
 	assert.NilError(t, err)
+	enableIPv6 := true
 	expected := &types.Project{
 		Name:       "load-network-link-local-ips",
 		WorkingDir: workingDir,
@@ -1711,7 +1712,7 @@ networks:
 			"network1": {
 				Name:       "network1",
 				Driver:     "bridge",
-				EnableIPv6: true,
+				EnableIPv6: &enableIPv6,
 				Ipam: types.IPAMConfig{
 					Config: []*types.IPAMPool{
 						{Subnet: "10.1.0.0/16"},
diff --git a/types/types.go b/types/types.go
index a5d9feb0..56af93e5 100644
--- a/types/types.go
+++ b/types/types.go
@@ -698,7 +698,7 @@ type NetworkConfig struct {
 	Internal   bool       `yaml:"internal,omitempty" json:"internal,omitempty"`
 	Attachable bool       `yaml:"attachable,omitempty" json:"attachable,omitempty"`
 	Labels     Labels     `yaml:"labels,omitempty" json:"labels,omitempty"`
-	EnableIPv6 bool       `yaml:"enable_ipv6,omitempty" json:"enable_ipv6,omitempty"`
+	EnableIPv6 *bool      `yaml:"enable_ipv6,omitempty" json:"enable_ipv6,omitempty"`
 	Extensions Extensions `yaml:"#extensions,inline,omitempty" json:"-"`
 }