diff --git a/runcoms/zlogin b/runcoms/zlogin
index 82f5b70..9911de5 100644
--- a/runcoms/zlogin
+++ b/runcoms/zlogin
@@ -16,6 +16,8 @@
 
 # Print a random, hopefully interesting, adage.
 if (( $+commands[fortune] )); then
-  fortune -a
-  print
+  if [[ -t 0 || -t 1 ]]; then
+    fortune -a
+    print
+  fi
 fi