diff --git a/install/unbound-install.sh b/install/unbound-install.sh
index 6727488f..4794939f 100644
--- a/install/unbound-install.sh
+++ b/install/unbound-install.sh
@@ -38,7 +38,6 @@ server:
   num-threads: 1
   hide-identity: yes
   hide-version: yes
-  harden-glue: yes
   harden-referral-path: yes
   qname-minimisation: yes
   rrset-roundrobin: yes