diff --git a/ocaml-calendar.spec b/ocaml-calendar.spec
index 4cb291e..9aa4d40 100644
--- a/ocaml-calendar.spec
+++ b/ocaml-calendar.spec
@@ -24,9 +24,7 @@
 Name:           ocaml-calendar
 Version:        2.04
 Release:        0
-%if %{defined ocaml_preserve_bytecode}
-%{ocaml_preserve_bytecode}
-%endif
+%{?ocaml_preserve_bytecode}
 Summary:        Objective Caml library for managing dates and times
 License:        LGPL-2.0
 Group:          Development/Libraries/Other