diff --git a/apps/app_setcidname.c b/apps/app_setcidname.c
index c73af9a43399e62f9d4a8dc5255a0b95c9a00c44..ee430911bef90d45a2f4e05841ff8506bd63a2ed 100755
--- a/apps/app_setcidname.c
+++ b/apps/app_setcidname.c
@@ -72,7 +72,7 @@ static int setcallerid_exec(struct ast_channel *chan, void *data)
 			strncpy(newcid, l, sizeof(newcid) - 1);
 		}
 	} else
-		strncpy(newcid, tmp, sizeof(newcid));
+		strncpy(newcid, tmp, sizeof(newcid) - 1);
 	ast_set_callerid(chan, !ast_strlen_zero(newcid) ? newcid : NULL, anitoo);
 	LOCAL_USER_REMOVE(u);
 	return res;