diff --git a/src/JSInterop/Microsoft.JSInterop.JS/src/src/Microsoft.JSInterop.ts b/src/JSInterop/Microsoft.JSInterop.JS/src/src/Microsoft.JSInterop.ts
index 5386b92bb5..2b3f51300c 100644
--- a/src/JSInterop/Microsoft.JSInterop.JS/src/src/Microsoft.JSInterop.ts
+++ b/src/JSInterop/Microsoft.JSInterop.JS/src/src/Microsoft.JSInterop.ts
@@ -141,14 +141,6 @@ module DotNet {
    * Receives incoming calls from .NET and dispatches them to JavaScript.
    */
   export const jsCallDispatcher = {
-    /**
-     * Finds the JavaScript function matching the specified identifier.
-     *
-     * @param identifier Identifies the globally-reachable function to be returned.
-     * @returns A Function instance.
-     */
-    findJSFunction,
-
     /**
      * Invokes the specified synchronous JavaScript function.
      *
@@ -227,8 +219,10 @@ module DotNet {
 
     let result: any = window;
     let resultIdentifier = 'window';
+    let lastSegmentValue: any;
     identifier.split('.').forEach(segment => {
       if (segment in result) {
+        lastSegmentValue = result;
         result = result[segment];
         resultIdentifier += '.' + segment;
       } else {
@@ -237,6 +231,8 @@ module DotNet {
     });
 
     if (result instanceof Function) {
+      result = result.bind(lastSegmentValue);
+      cachedJSFunctions[identifier] = result;
       return result;
     } else {
       throw new Error(`The value '${resultIdentifier}' is not a function.`);