--- a/my-log-mode.el	Sun Mar 01 13:30:14 2015 +0200
+++ b/my-log-mode.el	Sun Mar 01 13:32:03 2015 +0200
@@ -29,8 +29,7 @@
       (string-match fregex line)
       (setq fname (match-string 1 line))
       (when fname
-        (setq fline (string-to-int (match-string 2 line)))
-        )
+        (setq fline (string-to-number (match-string 2 line))))
       )
     (cond
      ( (and fname (file-exists-p fname))