diff --git a/README.md b/README.md
index 82ec053..69020f9 100644
--- a/README.md
+++ b/README.md
@@ -16,12 +16,16 @@ Usage
 By default, JSX syntax highlighting and indenting will be enabled only for
 files with the `.jsx` extension.  If you would like JSX in `.js` files, add
 
-    let g:jsx_ext_required = 0
+```viml
+let g:jsx_ext_required = 0
+```
 
 to your .vimrc or somewhere in your include path.  If you wish to restrict JSX
 to files with the pre-v0.12 `@jsx React.DOM` pragma, add
 
-    let g:jsx_pragma_required = 1
+```viml
+let g:jsx_pragma_required = 1
+```
 
 to your .vimrc or somewhere in your include path.
 
diff --git a/after/syntax/jsx.vim b/after/syntax/jsx.vim
index 63a1248..ec72dd4 100644
--- a/after/syntax/jsx.vim
+++ b/after/syntax/jsx.vim
@@ -41,3 +41,7 @@ syn region xmlString contained start=+{+ end=++ contains=jsBlock,javascriptBlock
 
 " Add jsxRegion to the lowest-level JS syntax cluster.
 syn cluster jsExpression add=jsxRegion
+
+" Allow jsxRegion to contain reserved words.
+" See: https://github.com/othree/yajs.vim
+syn cluster javascriptNoReserved add=jsxRegion