diff --git a/History.markdown b/History.markdown
index 3515bfb4..3d6fc631 100644
--- a/History.markdown
+++ b/History.markdown
@@ -8,6 +8,7 @@
 
   * When checking a Markdown extname, include position of the `.` (#3147)
   * Fix `jsonify` Liquid filter handling of boolean values (#3154)
+  * Add comma to value of `viewport` meta tag (#3170)
 
 ### Development Fixes