diff --git a/azurerm/resource_arm_virtual_machine.go b/azurerm/resource_arm_virtual_machine.go
index b753da4b8205..2681129ba04f 100644
--- a/azurerm/resource_arm_virtual_machine.go
+++ b/azurerm/resource_arm_virtual_machine.go
@@ -1406,6 +1406,9 @@ func flattenAzureRmVirtualMachineReviseDiskInfo(result map[string]interface{}, d
 
 func expandAzureRmVirtualMachinePlan(d *schema.ResourceData) (*compute.Plan, error) {
 	planConfigs := d.Get("plan").([]interface{})
+	if len(planConfigs) == 0 {
+		return nil, nil
+	}
 
 	planConfig := planConfigs[0].(map[string]interface{})