From a777731ba53360d8c3f235363331ddbf4a2d1a26 Mon Sep 17 00:00:00 2001
From: John Firebaugh <john.firebaugh@gmail.com>
Date: Mon, 18 Sep 2017 12:31:06 -0700
Subject: [PATCH] Don't forget boolean

---
 src/style-spec/group_by_layout.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/style-spec/group_by_layout.js b/src/style-spec/group_by_layout.js
index 03b1abe0b8d..6d64870860b 100644
--- a/src/style-spec/group_by_layout.js
+++ b/src/style-spec/group_by_layout.js
@@ -3,7 +3,7 @@ const refProperties = require('./util/ref_properties');
 
 function stringify(obj) {
     const type = typeof obj;
-    if (type === 'number' || type === 'string' || obj === undefined || obj === null)
+    if (type === 'number' || type === 'boolean' || type === 'string' || obj === undefined || obj === null)
         return JSON.stringify(obj);
 
     if (Array.isArray(obj)) {