diff --git a/pkg/edit/edit.go b/pkg/edit/edit.go
index 5271c1ed27..74ac6a1d03 100644
--- a/pkg/edit/edit.go
+++ b/pkg/edit/edit.go
@@ -35,8 +35,14 @@ import (
 func HasExtraFields(yamlString string, object runtime.Object) (string, error) {
 	switch object.(type) {
 	case *kops.Cluster:
-		editedClusterObj := kops.Cluster{}
-		err := yaml.UnmarshalStrict([]byte(yamlString), &editedClusterObj)
+		editedObj := kops.Cluster{}
+		err := yaml.UnmarshalStrict([]byte(yamlString), &editedObj)
+		if err == nil {
+			return "", nil
+		}
+	case *kops.InstanceGroup:
+		editedObj := kops.InstanceGroup{}
+		err := yaml.UnmarshalStrict([]byte(yamlString), &editedObj)
 		if err == nil {
 			return "", nil
 		}
diff --git a/pkg/edit/edit_test.go b/pkg/edit/edit_test.go
index 7eb5deb4ac..a7b9403b11 100644
--- a/pkg/edit/edit_test.go
+++ b/pkg/edit/edit_test.go
@@ -28,8 +28,8 @@ import (
 )
 
 var (
-	testTimestamp = metav1.Time{Time: time.Date(2017, 1, 1, 0, 0, 0, 0, time.UTC)}
-	testObj       = kops.Cluster{
+	testTimestamp  = metav1.Time{Time: time.Date(2017, 1, 1, 0, 0, 0, 0, time.UTC)}
+	testClusterObj = kops.Cluster{
 		ObjectMeta: metav1.ObjectMeta{
 			CreationTimestamp: testTimestamp,
 			Name:              "hello",
@@ -38,6 +38,15 @@ var (
 			KubernetesVersion: "1.2.3",
 		},
 	}
+	testIGObj = kops.InstanceGroup{
+		ObjectMeta: metav1.ObjectMeta{
+			CreationTimestamp: testTimestamp,
+			Name:              "hello",
+		},
+		Spec: kops.InstanceGroupSpec{
+			Role: kops.InstanceGroupRoleNode,
+		},
+	}
 )
 
 func TestHasExtraFields(t *testing.T) {
@@ -47,7 +56,7 @@ func TestHasExtraFields(t *testing.T) {
 		expected string
 	}{
 		{
-			obj: &testObj,
+			obj: &testClusterObj,
 			yaml: heredoc.Doc(`
 			apiVersion: kops.k8s.io/v1alpha2
 			kind: Cluster
@@ -61,7 +70,7 @@ func TestHasExtraFields(t *testing.T) {
 		},
 
 		{
-			obj: &testObj,
+			obj: &testClusterObj,
 			yaml: heredoc.Doc(`
 			apiVersion: kops.k8s.io/v1alpha2
 			kind: Cluster
@@ -81,7 +90,7 @@ func TestHasExtraFields(t *testing.T) {
 			`),
 		},
 		{
-			obj: &testObj,
+			obj: &testClusterObj,
 			yaml: heredoc.Doc(`
 			apiVersion: kops.k8s.io/v1alpha2
 			kind: Cluster
@@ -100,7 +109,7 @@ func TestHasExtraFields(t *testing.T) {
 			`),
 		},
 		{
-			obj: &testObj,
+			obj: &testClusterObj,
 			yaml: heredoc.Doc(`
 			apiVersion: kops.k8s.io/v1alpha2
 			kind: Cluster
@@ -113,6 +122,19 @@ func TestHasExtraFields(t *testing.T) {
 			`),
 			expected: "",
 		},
+		{
+			obj: &testIGObj,
+			yaml: heredoc.Doc(`
+			apiVersion: kops.k8s.io/v1alpha2
+			kind: InstanceGroup
+			metadata:
+			  creationTimestamp: "2017-01-01T00:00:00Z"
+			  name: hello
+			spec:
+			  role: Node
+			`),
+			expected: "",
+		},
 	}
 
 	for _, test := range tests {