diff --git a/cli/lmi/shell/LMIMethod.py b/cli/lmi/shell/LMIMethod.py
index 5681b2f..a658e8c 100644
--- a/cli/lmi/shell/LMIMethod.py
+++ b/cli/lmi/shell/LMIMethod.py
@@ -478,6 +478,8 @@ class LMIMethod(LMIWrapperBaseObject):
             if param in self._method.parameters:
                 if isinstance(value, LMIObjectFactory().LMIInstanceName):
                     value = value.wrapped_object
+                elif isinstance(value, LMIObjectFactory().LMIInstance):
+                    value = value.wrapped_object.path
                 t = self._method.parameters[param].type
                 method_args[param] = lmi_cast_to_cim(t, value)
             else: