diff --git a/src/etc/rc.newipsecdns b/src/etc/rc.newipsecdns
index 50a0ff572..7f189b5a0 100755
--- a/src/etc/rc.newipsecdns
+++ b/src/etc/rc.newipsecdns
@@ -45,4 +45,6 @@ if (file_exists('/var/run/booting')) {
     return;
 }
 
+$ipseclck = lock('ipsecdns', LOCK_EX);
 ipsec_configure_do(true);
+unlock($ipseclck);