diff --git a/builder/azure/arm/template_factory_test.TestVirtualMachineDeployment11.approved.json b/builder/azure/arm/template_factory_test.TestVirtualMachineDeployment11.approved.json
index 15b0ced92..96af5d2e2 100644
--- a/builder/azure/arm/template_factory_test.TestVirtualMachineDeployment11.approved.json
+++ b/builder/azure/arm/template_factory_test.TestVirtualMachineDeployment11.approved.json
@@ -149,7 +149,7 @@
               "lun": 0,
               "name": "[concat(parameters('dataDiskName'),'-1')]",
               "vhd": {
-                "uri": "[concat(parameters('storageAccountBlobEndpoint'),variables('vmStorageAccountContainerName'),parameters('dataDiskName'), '-1','.vhd')]"
+                "uri": "[concat(parameters('storageAccountBlobEndpoint'),variables('vmStorageAccountContainerName'),'/',parameters('dataDiskName'),'-1','.vhd')]"
               }
             }
           ],
diff --git a/builder/azure/common/template/template_builder.go b/builder/azure/common/template/template_builder.go
index 9c2e02d32..f7447d8e0 100644
--- a/builder/azure/common/template/template_builder.go
+++ b/builder/azure/common/template/template_builder.go
@@ -275,7 +275,7 @@ func (s *TemplateBuilder) SetAdditionalDisks(diskSizeGB []int32, dataDiskname st
 			dataDisks[i].ManagedDisk = profile.OsDisk.ManagedDisk
 		} else {
 			dataDisks[i].Vhd = &compute.VirtualHardDisk{
-				URI: to.StringPtr(fmt.Sprintf("[concat(parameters('storageAccountBlobEndpoint'),variables('vmStorageAccountContainerName'),parameters('dataDiskName'), '-%d','.vhd')]", i+1)),
+				URI: to.StringPtr(fmt.Sprintf("[concat(parameters('storageAccountBlobEndpoint'),variables('vmStorageAccountContainerName'),'/',parameters('dataDiskName'),'-%d','.vhd')]", i+1)),
 			}
 			dataDisks[i].ManagedDisk = nil
 		}
diff --git a/builder/azure/common/template/template_builder_test.TestBuildWindows02.approved.json b/builder/azure/common/template/template_builder_test.TestBuildWindows02.approved.json
index 06f554cda..281b8db83 100644
--- a/builder/azure/common/template/template_builder_test.TestBuildWindows02.approved.json
+++ b/builder/azure/common/template/template_builder_test.TestBuildWindows02.approved.json
@@ -163,7 +163,7 @@
               "lun": 0,
               "name": "[concat(parameters('dataDiskName'),'-1')]",
               "vhd": {
-                "uri": "[concat(parameters('storageAccountBlobEndpoint'),variables('vmStorageAccountContainerName'),parameters('dataDiskName'), '-1','.vhd')]"
+                "uri": "[concat(parameters('storageAccountBlobEndpoint'),variables('vmStorageAccountContainerName'),'/',parameters('dataDiskName'),'-1','.vhd')]"
               }
             },
             {
@@ -173,7 +173,7 @@
               "lun": 1,
               "name": "[concat(parameters('dataDiskName'),'-2')]",
               "vhd": {
-                "uri": "[concat(parameters('storageAccountBlobEndpoint'),variables('vmStorageAccountContainerName'),parameters('dataDiskName'), '-2','.vhd')]"
+                "uri": "[concat(parameters('storageAccountBlobEndpoint'),variables('vmStorageAccountContainerName'),'/',parameters('dataDiskName'),'-2','.vhd')]"
               }
             }
           ],