diff --git a/configs/chan_dahdi.conf.sample b/configs/chan_dahdi.conf.sample
index 18ac20294bff8e7e8760f898c94b4a38fd92aa1c..63be70d71fd5c040addbadeb4f23d6a924b76b9e 100644
--- a/configs/chan_dahdi.conf.sample
+++ b/configs/chan_dahdi.conf.sample
@@ -582,7 +582,8 @@ usecallerid=yes
 ; easily be re-attaching to a prior incoming call that was not yet hung up).
 ; This option changes the hangup to wait for a dialtone on the line, before
 ; marking the line as once again available for use with outgoing calls.
-;waitfordialtone=yes
+; Specified in milliseconds, not set by default.
+;waitfordialtone=1000
 ;
 ; For analog lines, enables Asterisk to use dialtone detection per channel
 ; if an incoming call was hung up before it was answered.  If dialtone is