diff --git a/src/Resizer.js b/src/Resizer.js
index 550ddca8..01322c3a 100644
--- a/src/Resizer.js
+++ b/src/Resizer.js
@@ -3,8 +3,8 @@ import React from 'react';
 
 let Resizer = React.createClass({
 
-    handleDown() {
-        this.props.down();
+    handleDown(event) {
+        this.props.down(event);
     },
 
     render() {
@@ -15,4 +15,4 @@ let Resizer = React.createClass({
 });
 
 
-export default Resizer;
\ No newline at end of file
+export default Resizer;
diff --git a/src/SplitPane.js b/src/SplitPane.js
index 555df5cb..ef4442fc 100644
--- a/src/SplitPane.js
+++ b/src/SplitPane.js
@@ -38,7 +38,7 @@ let SplitPane = React.createClass({
     },
 
 
-    down() {
+    down(event) {
         let position = this.props.orientation === 'horizontal' ? event.clientX : event.clientY;
         this.setState({
             active: true,
@@ -47,7 +47,7 @@ let SplitPane = React.createClass({
     },
 
 
-    move() {
+    move(event) {
         if (this.state.active) {
             const ref = this.refs.pane1;
             if (ref) {
@@ -138,4 +138,4 @@ let SplitPane = React.createClass({
 });
 
 
-export default SplitPane;
\ No newline at end of file
+export default SplitPane;