diff --git a/lib/coffee-script/repl.js b/lib/coffee-script/repl.js
index 3d8b58c1..3c0a1f43 100644
--- a/lib/coffee-script/repl.js
+++ b/lib/coffee-script/repl.js
@@ -156,7 +156,7 @@
     return repl.prompt();
   };
 
-  if (stdin.readable) {
+  if (stdin.readable && stdin.isRaw) {
     pipedInput = '';
     repl = {
       prompt: function() {
diff --git a/src/repl.coffee b/src/repl.coffee
index f052511a..d94c63eb 100644
--- a/src/repl.coffee
+++ b/src/repl.coffee
@@ -115,7 +115,7 @@ run = (buffer) ->
     error err
   repl.prompt()
 
-if stdin.readable
+if stdin.readable and stdin.isRaw
   # handle piped input
   pipedInput = ''
   repl =