diff --git a/exim.spec b/exim.spec
index e74c454..218c112 100644
--- a/exim.spec
+++ b/exim.spec
@@ -382,7 +382,7 @@ for i in \
 do
 	ln -sf exim_db.8.gz %{buildroot}/%{_mandir}/man8/$i.8.gz
 done
-perl -pi -e 's%%{_datadir}/doc/exim4%%{_docdir}/exim%{g}' `find %{buildroot}/%{_mandir}/man8 -name "*.8"`
+sed -i -e 's,%{_datadir}/doc/exim4,%{_docdir}/exim,g' $(find %{buildroot}/%{_mandir}/man8 -name "*.8")
 gzip -9 doc/*.txt
 #
 # package the utilities without executable permissions, to silence rpmlint warnings