diff --git a/lustre.spec.in b/lustre.spec.in
index 36f7d463092ca402fb953a8ed9ca8f27caaae44c..4aa5a2ab876b53f08c08583e2c4d9acc4f2b3bcb 100644
--- a/lustre.spec.in
+++ b/lustre.spec.in
@@ -124,6 +124,7 @@ mkdir -p $RPM_BUILD_ROOT/usr/src
 rm -f lustre-source
 ln -s $RPM_BUILD_ROOT/usr/src lustre-source
 make distdir distdir=lustre-source/lustre-%{version}
+chmod -R go-w lustre-source/lustre-%{version}
 
 cat >lustre.files <<EOF
 %attr(-, root, root) /sbin/mount.lustre