diff --git a/lib/markdown.coffee b/lib/markdown.coffee
index 6af7759..a332eeb 100644
--- a/lib/markdown.coffee
+++ b/lib/markdown.coffee
@@ -4,7 +4,7 @@ Implies that you don't mix up your tabs and spaces.
 Copyright 2015 Bruno Dias
 ###
 normaliseTabs = (text) ->
-  unless text? and typeof(text) == "string"
+  if not text? or typeof(text) != "string" or text == ""
     return ""
   lines = text.split('\n');
   indents = lines
@@ -20,6 +20,8 @@ normaliseTabs = (text) ->
       return curr
     return max
   )
+  if smallestIndent == ""
+    return text
   return lines.map((l) ->
     return l.replace(new RegExp('^' + smallestIndent), '')
   ).join('\n')