diff --git a/src/time-picker/clock.jsx b/src/time-picker/clock.jsx
index f7f6ee090db901..4827e528699bfa 100644
--- a/src/time-picker/clock.jsx
+++ b/src/time-picker/clock.jsx
@@ -17,6 +17,10 @@ const Clock = React.createClass({
     isActive: React.PropTypes.bool,
   },
 
+  contextTypes: {
+    muiTheme: React.PropTypes.object,
+  },
+
   getDefaultProps() {
     return {
       initialTime: new Date(),