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-rwxr-xr-xapps/app_alarmreceiver.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/apps/app_alarmreceiver.c b/apps/app_alarmreceiver.c
index 28d28b4c4..2c95be44c 100755
--- a/apps/app_alarmreceiver.c
+++ b/apps/app_alarmreceiver.c
@@ -318,8 +318,8 @@ static int write_metadata( FILE *logfile, char *signalling_type, struct ast_chan
char timestamp[80];
/* Extract the caller ID location */
-
- strncpy(workstring, chan->callerid, sizeof(workstring) - 1);
+ if (chan->cid.cid_num)
+ strncpy(workstring, chan->cid.cid_num, sizeof(workstring) - 1);
workstring[sizeof(workstring) - 1] = '\0';
ast_callerid_parse(workstring, &cn, &cl);