autoenv.zsh | 10 ++++++++--

diff --git a/autoenv.zsh b/autoenv.zsh
index 2fb77ce966da17e50d20e7000216e59e307e6dcd..772b1903195aa56f21de38535f5d5a9de09fe84f 100644
--- a/autoenv.zsh
+++ b/autoenv.zsh
@@ -66,8 +66,14 @@   # If the module is not available, define a wrapper around `stat`, and use its
   # terse output instead of format, which is not supported by busybox.
   # Assume '+mtime' as $1.
   _autoenv_get_file_mtime() {
-    setopt localoptions pipefail
-    stat -t $1 2>/dev/null | cut -f13 -d ' ' || echo 0
+    # setopt localoptions pipefail
+    local stat
+    stat=$(stat -t $1 2>/dev/null)
+    if [[ -n $stat ]]; then
+      echo ${${(s: :)stat}[13]}
+    else
+      echo 0
+    fi
   }
 else
   _autoenv_get_file_mtime() {