diff --git a/utest/objectmodel.test.cpp b/utest/objectmodel.test.cpp
index fe48d78..8aed7ad 100644
--- a/utest/objectmodel.test.cpp
+++ b/utest/objectmodel.test.cpp
@@ -261,7 +261,7 @@ namespace xo {
             };
 
             bool
-            IComplex_Any::_valid = valid_interface_implementation<AComplex, IComplex_Any>;
+            IComplex_Any::_valid = valid_interface_implementation<AComplex, IComplex_Any>();
 
             // ----------------------------------------------------------------