diff --git a/ocaml-cppo.spec b/ocaml-cppo.spec
index f743566..e6dd82a 100644
--- a/ocaml-cppo.spec
+++ b/ocaml-cppo.spec
@@ -20,9 +20,7 @@
 Name:           ocaml-cppo
 Version:        1.5.0
 Release:        0
-%if %{defined ocaml_preserve_bytecode}
-%{ocaml_preserve_bytecode}
-%endif
+%{?ocaml_preserve_bytecode}
 Summary:        The C preprocessor written in OCaml
 License:        BSD-3-Clause
 Group:          Development/Libraries/Other