diff --git a/zsh/rake.zsh b/zsh/rake.zsh
index ba88008..5e6872b 100644
--- a/zsh/rake.zsh
+++ b/zsh/rake.zsh
@@ -1,8 +1,8 @@
 _rake_does_task_list_need_generating () {
   if [ ! -f .rake_tasks ]; then return 0;
   else
-    accurate=$(stat -f%m .rake_tasks)
-    changed=$(stat -f%m Rakefile)
+    accurate=$(stat -c%Z .rake_tasks)
+    changed=$(stat -c%Z Rakefile)
     return $(expr $accurate '>=' $changed)
   fi
 }