diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index a013937d4e..54410c35fb 100644
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -2379,7 +2379,7 @@ static int ourport_tcp;				/*!< The port used for TCP connections */
 static int ourport_tls;				/*!< The port used for TCP/TLS connections */
 static struct sockaddr_in debugaddr;
 
-static struct ast_config *notify_types;		/*!< The list of manual NOTIFY types we know how to send */
+static struct ast_config *notify_types = NULL;		/*!< The list of manual NOTIFY types we know how to send */
 
 /*! some list management macros. */