diff --git a/wire.py b/wire.py
index <HASH>..<HASH> 100644
--- a/wire.py
+++ b/wire.py
@@ -723,7 +723,7 @@ Note that this is a platform-independent method of activating IME
 
   resources.append(
       SessionResource('/session/:sessionId/frame').
-      Post('''Change focus to another frame on the page. If the frame ID is \
+      Post('''Change focus to another frame on the page. If the frame `id` is \
 `null`, the server
 should switch to the page's default content.''').
       AddJsonParameter('id', '{string|number|null|WebElement JSON Object}',
LukeIS: updating wire protocol doc from frame switching the parameter is 'id' (so updating reference to it as 'ID' to lowercase). Fixes Issue <I>

r<I>