diff --git a/pkg/api/agentPoolOnlyApi/v20180331/apiloader_test.go b/pkg/api/agentPoolOnlyApi/v20180331/apiloader_test.go
index a725d4a0d0..eb6c704a2d 100644
--- a/pkg/api/agentPoolOnlyApi/v20180331/apiloader_test.go
+++ b/pkg/api/agentPoolOnlyApi/v20180331/apiloader_test.go
@@ -4,6 +4,7 @@ import (
 	"github.com/Azure/acs-engine/pkg/api"
 	"github.com/Azure/acs-engine/pkg/api/agentPoolOnlyApi/v20180331"
 	"github.com/Azure/acs-engine/pkg/api/common"
+	"github.com/Azure/acs-engine/pkg/helpers"
 	"github.com/Azure/acs-engine/pkg/i18n"
 	. "github.com/Azure/acs-engine/pkg/test"
 	"github.com/leonelquinteros/gotext"
@@ -380,4 +381,50 @@ var _ = Describe("v20180331 test suite", func() {
 			Expect(len(cs2.Properties.AgentPoolProfiles)).To(Equal(1))
 		})
 	})
+
+	Context("when autoscale properties are set they make it into the unversioned model", func() {
+		It("should migrate fields properly", func() {
+			model := v20180331.ManagedCluster{
+				Name: "myaks",
+				Properties: &v20180331.Properties{
+					DNSPrefix:         "myaks",
+					KubernetesVersion: k8sVersions[0],
+					AgentPoolProfiles: []*v20180331.AgentPoolProfile{
+						{
+							Name:           "agentpool1",
+							Count:          3,
+							MinCount:       helpers.PointerToInt(3),
+							MaxCount:       helpers.PointerToInt(10),
+							AutoscalePool:  helpers.PointerToBool(true),
+							VMSize:         "Standard_DS2_v2",
+							OSDiskSizeGB:   0,
+							StorageProfile: "ManagedDisk",
+						},
+					},
+					ServicePrincipalProfile: &v20180331.ServicePrincipalProfile{
+						ClientID: "clientID",
+						Secret:   "clientSecret",
+					},
+				},
+			}
+
+			modelString, _ := json.Marshal(model)
+			cs, sshAutoGenerated, err := apiloader.LoadContainerServiceForAgentPoolOnlyCluster([]byte(modelString), "2018-03-31", false, false, defaultK8sVersion, nil)
+			Expect(err).To(BeNil())
+			Expect(sshAutoGenerated).To(BeTrue())
+			Expect(cs.Properties.MasterProfile).To(BeNil())
+			Expect(cs.Properties.LinuxProfile).NotTo(BeNil())
+			Expect(cs.Properties.OrchestratorProfile).NotTo(BeNil())
+			Expect(cs.Properties.OrchestratorProfile.OrchestratorVersion).To(Equal(k8sVersions[0]))
+			Expect(cs.Properties.HostedMasterProfile).NotTo(BeNil())
+			Expect(cs.Properties.HostedMasterProfile.DNSPrefix).To(Equal(model.Properties.DNSPrefix))
+			Expect(cs.Properties.AgentPoolProfiles).NotTo(BeNil())
+			Expect(len(cs.Properties.AgentPoolProfiles)).To(Equal(1))
+			Expect(cs.Properties.AgentPoolProfiles[0].Name).To(Equal(model.Properties.AgentPoolProfiles[0].Name))
+			Expect(cs.Properties.AgentPoolProfiles[0].Count).To(Equal(model.Properties.AgentPoolProfiles[0].Count))
+			Expect(*cs.Properties.AgentPoolProfiles[0].MaxCount).To(Equal(10))
+			Expect(*cs.Properties.AgentPoolProfiles[0].MinCount).To(Equal(3))
+			Expect(*cs.Properties.AgentPoolProfiles[0].AutoscalePool).To(Equal(true))
+		})
+	})
 })
diff --git a/pkg/api/agentPoolOnlyApi/v20180331/types.go b/pkg/api/agentPoolOnlyApi/v20180331/types.go
index cc9fd3c783..9fe70f07cf 100644
--- a/pkg/api/agentPoolOnlyApi/v20180331/types.go
+++ b/pkg/api/agentPoolOnlyApi/v20180331/types.go
@@ -185,7 +185,7 @@ type AgentPoolProfile struct {
 	MaxPods        *int   `json:"maxPods,omitempty"`
 	MaxCount       *int   `json:"maxCount,omitempty"`
 	MinCount       *int   `json:"minCount,omitempty"`
-	AutoscalePool  bool   `json:"autoscalePool,omitempty"`
+	AutoscalePool  *bool  `json:"autoscalePool,omitempty"`
 
 	// OSType is the operating system type for agents
 	// Set as nullable to support backward compat because
diff --git a/pkg/api/agentPoolOnlyApi/vlabs/types.go b/pkg/api/agentPoolOnlyApi/vlabs/types.go
index c4d7d449f2..2411d95a23 100644
--- a/pkg/api/agentPoolOnlyApi/vlabs/types.go
+++ b/pkg/api/agentPoolOnlyApi/vlabs/types.go
@@ -131,7 +131,7 @@ type AgentPoolProfile struct {
 	VnetSubnetID        string `json:"vnetSubnetID,omitempty"`
 	MaxCount            *int   `json:"maxCount,omitempty"`
 	MinCount            *int   `json:"minCount,omitempty"`
-	AutoscalePool       bool   `json:"autoscalePool,omitempty"`
+	AutoscalePool       *bool  `json:"autoscalePool,omitempty"`
 
 	// OSType is the operating system type for agents
 	// Set as nullable to support backward compat because
diff --git a/pkg/api/types.go b/pkg/api/types.go
index 6bdd6f4c50..5506eafb16 100644
--- a/pkg/api/types.go
+++ b/pkg/api/types.go
@@ -451,7 +451,7 @@ type AgentPoolProfile struct {
 	ImageRef                     *ImageReference      `json:"imageReference,omitempty"`
 	MaxCount                     *int                 `json:"maxCount,omitempty"`
 	MinCount                     *int                 `json:"minCount,omitempty"`
-	AutoscalePool                bool                 `json:"autoscalePool,omitempty"`
+	AutoscalePool                *bool                `json:"autoscalePool,omitempty"`
 }
 
 // AgentPoolProfileRole represents an agent role
diff --git a/pkg/helpers/helpers.go b/pkg/helpers/helpers.go
index 8a20064e90..d9e3132f4d 100644
--- a/pkg/helpers/helpers.go
+++ b/pkg/helpers/helpers.go
@@ -63,6 +63,12 @@ func PointerToBool(b bool) *bool {
 	return &p
 }
 
+// PointerToInt returns a pointer to a int
+func PointerToInt(i int) *int {
+	p := i
+	return &p
+}
+
 // CreateSSH creates an SSH key pair.
 func CreateSSH(rg io.Reader, s *i18n.Translator) (privateKey *rsa.PrivateKey, publicKeyString string, err error) {
 	privateKey, err = rsa.GenerateKey(rg, SSHKeySize)