diff --git a/pkg/api/v1/conversion.go b/pkg/api/v1/conversion.go
index d356e094a26..2c6a635eb9c 100644
--- a/pkg/api/v1/conversion.go
+++ b/pkg/api/v1/conversion.go
@@ -235,6 +235,7 @@ func Convert_v1_ReplicationController_to_extensions_ReplicaSet(in *v1.Replicatio
 
 func Convert_v1_ReplicationControllerSpec_to_extensions_ReplicaSetSpec(in *v1.ReplicationControllerSpec, out *extensions.ReplicaSetSpec, s conversion.Scope) error {
 	out.Replicas = *in.Replicas
+	out.MinReadySeconds = in.MinReadySeconds
 	if in.Selector != nil {
 		out.Selector = new(metav1.LabelSelector)
 		metav1.Convert_map_to_unversioned_LabelSelector(&in.Selector, out.Selector, s)
diff --git a/pkg/api/v1/conversion_test.go b/pkg/api/v1/conversion_test.go
index 72c1c0bf95b..18f5c9aabf0 100644
--- a/pkg/api/v1/conversion_test.go
+++ b/pkg/api/v1/conversion_test.go
@@ -238,8 +238,9 @@ func TestReplicationControllerConversion(t *testing.T) {
 			Namespace: "namespace",
 		},
 		Spec: v1.ReplicationControllerSpec{
-			Replicas: &replicas,
-			Selector: map[string]string{"foo": "bar", "bar": "foo"},
+			Replicas:        &replicas,
+			MinReadySeconds: 32,
+			Selector:        map[string]string{"foo": "bar", "bar": "foo"},
 			Template: &v1.PodTemplateSpec{
 				ObjectMeta: metav1.ObjectMeta{
 					Labels: map[string]string{"foo": "bar", "bar": "foo"},