diff --git a/scripts/rebuild-rhel-kernel-rpm b/scripts/rebuild-rhel-kernel-rpm
index 426da3106..b605a2323 100755
--- a/scripts/rebuild-rhel-kernel-rpm
+++ b/scripts/rebuild-rhel-kernel-rpm
@@ -53,16 +53,21 @@ kernel="${kernel%.${arch}}"
 kernel_src_rpm="${kernel}.src.rpm"
 kver="${kernel#kernel-}"
 distro="$(sed -n -e 's/^\(.*\) release .*$/\1/p' /etc/issue)"
-releasever="$(sed -n -e 's/^.* release \([0-9.]*\) .*$/\1/p' /etc/issue)"
+if [ -n "$2" ]; then
+  releasever="$2"
+else
+  releasever="$(sed -n -e 's/^.* release \([0-9.]*\) .*$/\1/p' /etc/issue)"
+fi
 releasevermajor="$(echo $releasever | cut -f1 -d.)"
 releaseverminor="$(echo $releasever | cut -f2 -d.)"
 case "$distro" in
   "CentOS"*)
-    if [ $releasevermajor = 5 ]; then
-      srpm_url=("http://vault.centos.org/${releasever}/os/SRPMS" "http://vault.centos.org/${releasever}/updates/SRPMS")
-    else
-      srpm_url=("http://vault.centos.org/${releasever}/os/Source/SPackages" "http://vault.centos.org/${releasever}/updates/Source/SPackages")
-    fi
+    case $releasever in
+      5.*|6.[01])
+        srpm_url=("http://vault.centos.org/${releasever}/os/SRPMS" "http://vault.centos.org/${releasever}/updates/SRPMS");;
+      *)
+        srpm_url=("http://vault.centos.org/${releasever}/os/Source/SPackages" "http://vault.centos.org/${releasever}/updates/Source/SPackages");;
+    esac
     ;;
   "Red Hat Enterprise Linux"*)
     srpm_url=("http://ftp.redhat.com/pub/redhat/linux/enterprise/${releasevermajor}Server/en/os/SRPMS")