diff --git a/pash b/pash
index 6e6b4ad..4180492 100755
--- a/pash
+++ b/pash
@@ -217,7 +217,7 @@ main() {
 
     # Ensure that we leave the terminal in a usable
     # state on exit or Ctrl+C.
-    trap 'stty echo icanon' INT EXIT
+    [ -t 1 ] && trap 'stty echo icanon' INT EXIT
 
     case $1 in
         a*) pw_add  "$2" ;;