diff --git a/CHANGELOG.md b/CHANGELOG.md
index 65ba092d..91f4382d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,12 @@
 All notable changes to this project will be documented in this file. This
 project adheres to [Semantic Versioning](http://semver.org).
 
+## [Unreleased]
+
+### Removed
+
+- Remove unused `$medium-screen` and `$large-screen` breakpoints. ([#285])
+
 ## [1.6.0] - 2017-05-12
 
 ### Added
diff --git a/core/_variables.scss b/core/_variables.scss
index cc4b7176..a6a4385b 100644
--- a/core/_variables.scss
+++ b/core/_variables.scss
@@ -1,7 +1,3 @@
-// Breakpoints
-$medium-screen: 600px;
-$large-screen: 900px;
-
 // Typography
 $base-font-family: $font-stack-system;
 $heading-font-family: $base-font-family;