diff --git a/core/src/com/cloud/hypervisor/vmware/resource/VmwareResource.java b/core/src/com/cloud/hypervisor/vmware/resource/VmwareResource.java
index 896805bc999..2dff13af186 100755
--- a/core/src/com/cloud/hypervisor/vmware/resource/VmwareResource.java
+++ b/core/src/com/cloud/hypervisor/vmware/resource/VmwareResource.java
@@ -1342,18 +1342,18 @@ public class VmwareResource implements StoragePoolResource, ServerResource, Vmwa
                     controllerKey = ideControllerKey;
                 } else {
                     if(vol.getType() == Volume.Type.ROOT) {
-                        if(vmSpec.getDetails() != null && vmSpec.getDetails().get("root.disk.controller") != null)
-                        {
-                            if(vmSpec.getDetails().get("root.disk.controller").equalsIgnoreCase("scsi"))
-                                controllerKey = scsiControllerKey;
-                            else
-                                controllerKey = ideControllerKey;
-                        } else {
-                            if(_rootDiskController == DiskControllerType.scsi)
-                                controllerKey = scsiControllerKey;
-                            else
-                                controllerKey = ideControllerKey;
-                        }
+                    	if(vmSpec.getDetails() != null && vmSpec.getDetails().get(VmDetailConstants.ROOK_DISK_CONTROLLER) != null)
+                    	{
+                    		if(vmSpec.getDetails().get(VmDetailConstants.ROOK_DISK_CONTROLLER).equalsIgnoreCase("scsi"))
+    	                		controllerKey = scsiControllerKey;
+    	                	else
+    	                		controllerKey = ideControllerKey;
+                    	} else {
+    	                	if(_rootDiskController == DiskControllerType.scsi)
+    	                		controllerKey = scsiControllerKey;
+    	                	else
+    	                		controllerKey = ideControllerKey;
+                    	}
                     } else {
                         // data volume always uses SCSI
                         controllerKey = scsiControllerKey;
diff --git a/core/src/com/cloud/vm/VmDetailConstants.java b/core/src/com/cloud/vm/VmDetailConstants.java
index dd819975f96..d177ab80811 100644
--- a/core/src/com/cloud/vm/VmDetailConstants.java
+++ b/core/src/com/cloud/vm/VmDetailConstants.java
@@ -19,5 +19,6 @@ package com.cloud.vm;
 
 public interface VmDetailConstants {
 	public static final String KEYBOARD = "keyboard";
-	public static final String NIC_ADAPTER = "nic_adapter";
+	public static final String NIC_ADAPTER = "nicAdapter";
+	public static final String ROOK_DISK_CONTROLLER = "rootDiskController";
 }