diff --git a/lib/coffee-script/coffee-script.js b/lib/coffee-script/coffee-script.js
index 3b397f7c46..78e34cd991 100644
--- a/lib/coffee-script/coffee-script.js
+++ b/lib/coffee-script/coffee-script.js
@@ -370,7 +370,8 @@
     } else if (sources[filename] != null) {
       answer = compile(sources[filename], {
         filename: filename,
-        sourceMap: true
+        sourceMap: true,
+        literate: helpers.isLiterate(filename)
       });
       return answer.sourceMap;
     } else {
diff --git a/src/coffee-script.coffee b/src/coffee-script.coffee
index cca763e590..a2329f6e8c 100644
--- a/src/coffee-script.coffee
+++ b/src/coffee-script.coffee
@@ -366,6 +366,7 @@ getSourceMap = (filename) ->
     answer = compile sources[filename],
       filename: filename
       sourceMap: yes
+      literate: helpers.isLiterate filename
     answer.sourceMap
   else
     null