diff --git a/nsupdate.d/dist.config.sample b/nsupdate.d/dist.config.sample
index 185200e..b22d7d4 100755
--- a/nsupdate.d/dist.config.sample
+++ b/nsupdate.d/dist.config.sample
@@ -22,6 +22,9 @@ MX="NO"
 # Suppress all messages.
 SILENT="NO"
 
+# Time to Live
+TTL=300
+
 # Login credentials for the inwx admin interface
 INWX_USER="USERNAME"
 INWX_PASS="PASSWORD"
diff --git a/nsupdate.sh b/nsupdate.sh
index b5d8c34..c991a7d 100755
--- a/nsupdate.sh
+++ b/nsupdate.sh
@@ -118,7 +118,7 @@ if ls $(dirname $0)/nsupdate.d/*.config &> /dev/null; then
                      <member>
                         <name>ttl</name>
                         <value>
-                           <int>300</int>
+                           <int>$TTL</int>
                            </value>
                      </member>
                   </struct>
@@ -142,6 +142,7 @@ if ls $(dirname $0)/nsupdate.d/*.config &> /dev/null; then
       unset IPV6
       unset MX
       unset WAN_IP
+      unset TTL
       unset NSLOOKUP
       unset INWX_PASS
       unset INWX_USER