diff --git a/conf/sip_profiles/external.xml b/conf/sip_profiles/external.xml
index 4e6ac36fbd..a6cd1521bf 100644
--- a/conf/sip_profiles/external.xml
+++ b/conf/sip_profiles/external.xml
@@ -26,6 +26,7 @@
     <param name="hold-music" value="$${hold_music}"/>
     <param name="use-rtp-timer" value="true"/>
     <param name="rtp-timer-name" value="soft"/>
+    <param name="enable-100rel" value="false"/>
     <!-- This could be set to "passive" -->
     <param name="manage-presence" value="false"/>
 
diff --git a/conf/sip_profiles/internal.xml b/conf/sip_profiles/internal.xml
index 41a2d78425..86005add22 100644
--- a/conf/sip_profiles/internal.xml
+++ b/conf/sip_profiles/internal.xml
@@ -55,7 +55,7 @@
     <!--<param name="apply-nat-acl" value="rfc1918"/>-->
     <!--<param name="aggressive-nat-detection" value="true"/>-->
     <!--<param name="enable-timer" value="false"/>-->
-    <!--<param name="enable-100rel" value="false"/>-->
+    <param name="enable-100rel" value="false"/>
     <!--<param name="minimum-session-expires" value="120"/>-->
     <param name="apply-inbound-acl" value="domains"/>
     <!--<param name="apply-register-acl" value="domains"/>-->