diff --git a/dom/inputmethod/MozKeyboard.js b/dom/inputmethod/MozKeyboard.js
index 6b584279b76..7bec21534a5 100644
--- a/dom/inputmethod/MozKeyboard.js
+++ b/dom/inputmethod/MozKeyboard.js
@@ -104,6 +104,7 @@ function MozInputMethod() { }
 
 MozInputMethod.prototype = {
   _inputcontext: null,
+  _wrappedInputContext: null,
   _layouts: {},
   _window: null,
   _isSystem: false,
@@ -211,7 +212,7 @@ MozInputMethod.prototype = {
     if (!WindowMap.isActive(this._window)) {
       return null;
     }
-    return this._inputcontext;
+    return this._wrappedInputContext;
   },
 
   set oninputcontextchange(handler) {
@@ -226,6 +227,7 @@ MozInputMethod.prototype = {
     if (this._inputcontext) {
       this._inputcontext.destroy();
       this._inputcontext = null;
+      this._wrappedInputContext = null;
       this._mgmt._supportsSwitching = false;
     }
 
@@ -236,6 +238,10 @@ MozInputMethod.prototype = {
 
       this._inputcontext = new MozInputContext(data);
       this._inputcontext.init(this._window);
+      // inputcontext will be exposed as a WebIDL object. Create its
+      // content-side object explicitly to avoid Bug 1001325.
+      this._wrappedInputContext =
+        this._window.MozInputContext._create(this._window, this._inputcontext);
     }
 
     let event = new this._window.Event("inputcontextchange",