diff --git a/firefox.spec b/firefox.spec
index 4b1f147..38f1449 100644
--- a/firefox.spec
+++ b/firefox.spec
@@ -86,7 +86,7 @@ Obsoletes:      phoenix, mozilla-firebird, MozillaFirebird
 Provides:       webclient
 %define ffdir %{_libdir}/firefox-%{version}
 
-%if %{build_devel_package}
+%if ! %{build_devel_package}
 AutoProv: 0
 %define _use_internal_dependency_generator 0
 %define __find_requires %{SOURCE100}