diff --git a/ovm/scripts/vm/hypervisor/ovm/OvmVmModule.py b/ovm/scripts/vm/hypervisor/ovm/OvmVmModule.py
index 3c362d4b676..d4f81d73f5a 100755
--- a/ovm/scripts/vm/hypervisor/ovm/OvmVmModule.py
+++ b/ovm/scripts/vm/hypervisor/ovm/OvmVmModule.py
@@ -500,6 +500,10 @@ class OvmVm(OvmObject):
                 scope = 'cfg'
                 vmPath = OvmHost()._getVmPathFromPrimaryStorage(vmName)
             
+            vmType = OvmVm()._getVmTypeFromConfigFile(vmPath)
+            if vmType != 'HVM':
+                raise Exception("Only HVM supports attaching/detaching ISO")
+            
             if not isAttach:
                 iso = ''
             else: