diff --git a/etc/hook.d/70-install-ssh b/etc/hook.d/70-install-ssh
index 1a779e5..4516add 100755
--- a/etc/hook.d/70-install-ssh
+++ b/etc/hook.d/70-install-ssh
@@ -53,8 +53,10 @@ function setupDebian
 #
 function setupCentOS4
 {
+    chroot ${prefix} /bin/mount /proc
     chroot ${prefix} /usr/bin/yum -y install openssh-server
     chroot ${prefix} /usr/bin/yum -y install openssh-server
+    chroot ${prefix} /bin/umount /proc
 }