diff --git a/pkgdiff.spec b/pkgdiff.spec
index bf4c6bb..215f509 100644
--- a/pkgdiff.spec
+++ b/pkgdiff.spec
@@ -52,7 +52,11 @@ perl Makefile.pl -install --prefix=%{_prefix} --destdir=%{buildroot}
 
 # Generate man page
 cp %{name}.pl %{name}
+%if 0%{?rhel} && 0%{?rhel} <= 6
+help2man -N -o %{name}.1 ./%{name}
+%else
 help2man -N --no-discard-stderr -o %{name}.1 ./%{name}
+%endif
 sed -i 's/\(.\)/\n\1/' %{name}.1
 sed -i 's/PACKAGE/PKGDIFF/g' %{name}.1
 install -m 0644 %{name}.1 %{buildroot}%{_mandir}/man1