diff --git a/lib/output.js b/lib/output.js
index 50e5aa43..e4fc8333 100644
--- a/lib/output.js
+++ b/lib/output.js
@@ -379,7 +379,7 @@ function OutputStream(options) {
     };
 
     if (options.preamble) {
-        print(options.preamble.replace(/\r\n?|[\n\u2028\u2029]|\s*$/g, "\n"));
+        print(options.preamble.replace(/\\n|\r\n?|[\n\u2028\u2029]|\s*$/g, "\n"));
     }
 
     var stack = [];