diff --git a/CHANGES b/CHANGES
index 9a42684ae4..b1b2f9f67f 100644
--- a/CHANGES
+++ b/CHANGES
@@ -214,6 +214,11 @@ Asterisk Modules
  * Modules marked as deprecated are no longer marked as building by default. Enabling
    these modules is still available via menuselect.
 
+IAX2 Changes
+------------
+* authdebug is now disabled by default. To enable this functionaility again
+   set authdebug = yes in iax.conf.
+
 ------------------------------------------------------------------------------
 --- Functionality changes from Asterisk 1.6.2 to Asterisk 1.8 ----------------
 ------------------------------------------------------------------------------
diff --git a/channels/chan_iax2.c b/channels/chan_iax2.c
index 7d0ee9bae7..6de82182be 100644
--- a/channels/chan_iax2.c
+++ b/channels/chan_iax2.c
@@ -287,7 +287,7 @@ static int jittertargetextra = 40; /* number of milliseconds the new jitter buff
 static int trunkfreq = 20;
 static int trunkmaxsize = MAX_TRUNKDATA;
 
-static int authdebug = 1;
+static int authdebug = 0;
 static int autokill = 0;
 static int iaxcompat = 0;
 static int last_authmethod = 0;
diff --git a/configs/iax.conf.sample b/configs/iax.conf.sample
index d08aa31dce..35b8d7744c 100644
--- a/configs/iax.conf.sample
+++ b/configs/iax.conf.sample
@@ -254,10 +254,10 @@ forcejitterbuffer=no
 ;
 ; subscribe_network_change_event = yes ; on by default
 ;
-; You can disable authentication debugging to reduce the amount of
+; You can enable authentication debugging to increase the amount of
 ; debugging traffic.
 ;
-;authdebug=no
+;authdebug = yes
 ;
 ; See https://wiki.asterisk.org/wiki/display/AST/IP+Quality+of+Service for a description of these parameters.
 ;tos=ef