--- a/tt.c	Fri Apr 01 10:06:32 2011 +0200
+++ b/tt.c	Wed Apr 06 13:01:06 2011 +0200
@@ -263,7 +263,7 @@
             prev_time_str = strdup(buf);
             is_prev_time_read = 1;
         }
-        else if (n == 0) /* eof */
+        else if (feof(f))
         {
             /* Time until now, for the last switch */
             int diff = get_current_time() - prev_time;