diff --git a/mode/python/python.js b/mode/python/python.js
index 5142f97077..efeed7f154 100644
--- a/mode/python/python.js
+++ b/mode/python/python.js
@@ -185,7 +185,7 @@
     }
 
     function tokenStringFactory(delimiter) {
-      while ("rub".indexOf(delimiter.charAt(0).toLowerCase()) >= 0)
+      while ("rubf".indexOf(delimiter.charAt(0).toLowerCase()) >= 0)
         delimiter = delimiter.substr(1);
 
       var singleline = delimiter.length == 1;