diff --git a/dom/mobilemessage/src/DOMMobileMessageError.cpp b/dom/mobilemessage/src/DOMMobileMessageError.cpp
new file mode 100644
index 000000000000..92778317f49e
--- /dev/null
+++ b/dom/mobilemessage/src/DOMMobileMessageError.cpp
@@ -0,0 +1,71 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+* License, v. 2.0. If a copy of the MPL was not distributed with this file,
+* You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "DOMMobileMessageError.h"
+#include "mozilla/dom/DOMMobileMessageErrorBinding.h"
+#include "mozilla/dom/UnionTypes.h"
+#include "nsIDOMMozMmsMessage.h"
+#include "nsIDOMMozSmsMessage.h"
+
+using namespace mozilla::dom;
+
+NS_IMPL_CYCLE_COLLECTION_CLASS(DOMMobileMessageError)
+
+NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(DOMMobileMessageError, DOMError)
+  NS_IMPL_CYCLE_COLLECTION_UNLINK(mSms)
+  NS_IMPL_CYCLE_COLLECTION_UNLINK(mMms)
+NS_IMPL_CYCLE_COLLECTION_UNLINK_END
+
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(DOMMobileMessageError, DOMError)
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mSms)
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mMms)
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(DOMMobileMessageError)
+NS_INTERFACE_MAP_END_INHERITING(DOMError)
+
+NS_IMPL_ADDREF_INHERITED(DOMMobileMessageError, DOMError)
+NS_IMPL_RELEASE_INHERITED(DOMMobileMessageError, DOMError)
+
+DOMMobileMessageError::DOMMobileMessageError(nsPIDOMWindow* aWindow,
+                                             const nsAString& aName,
+                                             nsIDOMMozSmsMessage* aSms)
+  : DOMError(aWindow, aName)
+  , mSms(aSms)
+  , mMms(nullptr)
+{
+}
+
+DOMMobileMessageError::DOMMobileMessageError(nsPIDOMWindow* aWindow,
+                                             const nsAString& aName,
+                                             nsIDOMMozMmsMessage* aMms)
+  : DOMError(aWindow, aName)
+  , mSms(nullptr)
+  , mMms(aMms)
+{
+}
+
+void
+DOMMobileMessageError::GetData(OwningMozSmsMessageOrMozMmsMessage& aRetVal) const
+{
+  if (mSms) {
+    aRetVal.SetAsMozSmsMessage() = mSms;
+    return;
+  }
+
+  if (mMms) {
+    aRetVal.SetAsMozMmsMessage() = mMms;
+    return;
+  }
+
+  MOZ_ASSUME_UNREACHABLE("Bad object with invalid mSms and mMms.");
+}
+
+JSObject*
+DOMMobileMessageError::WrapObject(JSContext* aCx)
+{
+  return DOMMobileMessageErrorBinding::Wrap(aCx, this);
+}
diff --git a/dom/mobilemessage/src/DOMMobileMessageError.h b/dom/mobilemessage/src/DOMMobileMessageError.h
new file mode 100644
index 000000000000..a620639aa021
--- /dev/null
+++ b/dom/mobilemessage/src/DOMMobileMessageError.h
@@ -0,0 +1,45 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+* License, v. 2.0. If a copy of the MPL was not distributed with this file,
+* You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_dom_MobileMessageError_h
+#define mozilla_dom_MobileMessageError_h
+
+#include "mozilla/dom/DOMError.h"
+
+class nsIDOMMozMmsMessage;
+class nsIDOMMozSmsMessage;
+
+namespace mozilla {
+namespace dom {
+
+class OwningMozSmsMessageOrMozMmsMessage;
+
+class DOMMobileMessageError MOZ_FINAL : public DOMError
+{
+public:
+  NS_DECL_ISUPPORTS_INHERITED
+  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(DOMMobileMessageError, DOMError)
+
+  DOMMobileMessageError(nsPIDOMWindow* aWindow, const nsAString& aName,
+                        nsIDOMMozSmsMessage* aSms);
+
+  DOMMobileMessageError(nsPIDOMWindow* aWindow, const nsAString& aName,
+                        nsIDOMMozMmsMessage* aMms);
+
+  virtual JSObject*
+  WrapObject(JSContext* aCx) MOZ_OVERRIDE;
+
+  void GetData(OwningMozSmsMessageOrMozMmsMessage& aRetVal) const;
+
+private:
+  nsCOMPtr<nsIDOMMozSmsMessage> mSms;
+  nsCOMPtr<nsIDOMMozMmsMessage> mMms;
+};
+
+} // namespace dom
+} // namespace mozilla
+
+#endif // mozilla_dom_MobileMessageError_h
diff --git a/dom/mobilemessage/src/moz.build b/dom/mobilemessage/src/moz.build
index 3bd98ba75679..893fb14e7b50 100644
--- a/dom/mobilemessage/src/moz.build
+++ b/dom/mobilemessage/src/moz.build
@@ -37,6 +37,7 @@ elif CONFIG['MOZ_WIDGET_TOOLKIT'] == 'gonk' and CONFIG['MOZ_B2G_RIL']:
     ]
 
 EXPORTS.mozilla.dom += [
+    'DOMMobileMessageError.h',
     'MmsMessage.h',
     'MobileMessageManager.h',
     'SmsFilter.h',
@@ -46,6 +47,7 @@ EXPORTS.mozilla.dom += [
 
 UNIFIED_SOURCES += [
     'Constants.cpp',
+    'DOMMobileMessageError.cpp',
     'ipc/SmsChild.cpp',
     'ipc/SmsIPCService.cpp',
     'ipc/SmsParent.cpp',
diff --git a/dom/tests/mochitest/general/test_interfaces.html b/dom/tests/mochitest/general/test_interfaces.html
index 352b7b3590fd..9c0fa2d9ac55 100644
--- a/dom/tests/mochitest/general/test_interfaces.html
+++ b/dom/tests/mochitest/general/test_interfaces.html
@@ -305,6 +305,8 @@ var interfaceNamesInGlobalScope =
     "DOMImplementation",
 // IMPORTANT: Do not change this list without review from a DOM peer!
     {name: "DOMMMIError", b2g: true, pref: "dom.mobileconnection.enabled"},
+// IMPORTANT: Do not change this list without review from a DOM peer!
+    {name: "DOMMobileMessageError", b2g: true, pref: "dom.sms.enabled"},
 // IMPORTANT: Do not change this list without review from a DOM peer!
     "DOMParser",
 // IMPORTANT: Do not change this list without review from a DOM peer!
diff --git a/dom/webidl/DOMMobileMessageError.webidl b/dom/webidl/DOMMobileMessageError.webidl
new file mode 100644
index 000000000000..fc87c59911d4
--- /dev/null
+++ b/dom/webidl/DOMMobileMessageError.webidl
@@ -0,0 +1,10 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[Pref="dom.sms.enabled"]
+interface DOMMobileMessageError : DOMError {
+  readonly attribute (MozSmsMessage or MozMmsMessage) data;
+};
diff --git a/dom/webidl/moz.build b/dom/webidl/moz.build
index 6a8ee194790a..7f411b341326 100644
--- a/dom/webidl/moz.build
+++ b/dom/webidl/moz.build
@@ -88,6 +88,7 @@ WEBIDL_FILES = [
     'DOMError.webidl',
     'DOMException.webidl',
     'DOMImplementation.webidl',
+    'DOMMobileMessageError.webidl',
     'DOMParser.webidl',
     'DOMPoint.webidl',
     'DOMQuad.webidl',