diff --git a/stdair.spec b/stdair.spec
index a943b7a..63bec41 100644
--- a/stdair.spec
+++ b/stdair.spec
@@ -70,7 +70,7 @@ rm -f %{buildroot}/%{_docdir}/%{name}/html/installdox
 
 # Remove additional documentation files (those files are already available
 # in the project top directory)
-rm -f $RPM_BUILD_ROOT%{_docdir}/%{name}/{NEWS,README.md,AUTHORS}
+rm -f %{buildroot}%{_docdir}/%{name}/{NEWS,README.md,AUTHORS}
 
 %check
 ctest