diff --git a/Source/com/IUnknown.h b/Source/com/IUnknown.h
index 5f33e5df6..78cbc0f09 100644
--- a/Source/com/IUnknown.h
+++ b/Source/com/IUnknown.h
@@ -387,7 +387,7 @@ namespace ProxyStub {
                 delete &_parent;
             }
         }
-        inline uint32_t Complete(const Core::instance_id& impl, const uint32_t id, const RPC::Data::Output::mode how)
+        inline uint32_t Complete(const Core::instance_id& impl, const uint32_t id, const RPC::Data::Output::mode how) const
         {
             // This method is called from the stubs.
             uint32_t result = Core::ERROR_NONE;
@@ -500,7 +500,7 @@ POP_WARNING()
         {
             return (_unknown.Interface(implementation, id));
         }
-        uint32_t Complete(const Core::instance_id& instance, const uint32_t id, const RPC::Data::Output::mode how)
+        uint32_t Complete(const Core::instance_id& instance, const uint32_t id, const RPC::Data::Output::mode how) const
         {
             return (_unknown.Complete(instance, id, how));
         }