diff --git a/helpers.inc.php b/helpers.inc.php
index 1c39663..cbd434b 100644
--- a/helpers.inc.php
+++ b/helpers.inc.php
@@ -1090,7 +1090,7 @@ function check_process($pid)
 
 function which_dir($bin)
 {
-  return dirname(which_path($bin));
+  return realpath(dirname(which_path($bin)));
 }
 
 function which_path($bin)