diff --git a/dom/base/nsDOMWindowUtils.cpp b/dom/base/nsDOMWindowUtils.cpp
index 055fc1e0f14..21a38fb8c8b 100644
--- a/dom/base/nsDOMWindowUtils.cpp
+++ b/dom/base/nsDOMWindowUtils.cpp
@@ -1308,9 +1308,9 @@ nsDOMWindowUtils::SendSimpleGestureEvent(const nsAString& aType,
     msg = NS_SIMPLE_GESTURE_SWIPE;
   else if (aType.EqualsLiteral("MozMagnifyGestureStart"))
     msg = NS_SIMPLE_GESTURE_MAGNIFY_START;
-  else if (aType.EqualsLiteral("MozMagnifyGestureUpdate"))
-    msg = NS_SIMPLE_GESTURE_MAGNIFY_UPDATE;
-  else if (aType.EqualsLiteral("MozMagnifyGesture")) {
+  else if (aType.EqualsLiteral("MozMagnifyGestureUpdate")) {
+    msg = eMagnifyGestureUpdate;
+  } else if (aType.EqualsLiteral("MozMagnifyGesture")) {
     msg = eMagnifyGesture;
   } else if (aType.EqualsLiteral("MozRotateGestureStart")) {
     msg = eRotateGestureStart;
diff --git a/dom/events/EventNameList.h b/dom/events/EventNameList.h
index 566ba94c642..95fc144452d 100644
--- a/dom/events/EventNameList.h
+++ b/dom/events/EventNameList.h
@@ -872,7 +872,7 @@ NON_IDL_EVENT(MozMagnifyGestureStart,
               EventNameType_None,
               eSimpleGestureEventClass)
 NON_IDL_EVENT(MozMagnifyGestureUpdate,
-              NS_SIMPLE_GESTURE_MAGNIFY_UPDATE,
+              eMagnifyGestureUpdate,
               EventNameType_None,
               eSimpleGestureEventClass)
 NON_IDL_EVENT(MozMagnifyGesture,
diff --git a/widget/EventMessageList.h b/widget/EventMessageList.h
index 63a9052a2eb..085c627cd6e 100644
--- a/widget/EventMessageList.h
+++ b/widget/EventMessageList.h
@@ -278,7 +278,7 @@ NS_EVENT_MESSAGE(NS_SIMPLE_GESTURE_SWIPE_UPDATE,   NS_SIMPLE_GESTURE_EVENT_START
 NS_EVENT_MESSAGE(NS_SIMPLE_GESTURE_SWIPE_END,      NS_SIMPLE_GESTURE_EVENT_START + 3)
 NS_EVENT_MESSAGE(NS_SIMPLE_GESTURE_SWIPE,          NS_SIMPLE_GESTURE_EVENT_START + 4)
 NS_EVENT_MESSAGE(NS_SIMPLE_GESTURE_MAGNIFY_START,  NS_SIMPLE_GESTURE_EVENT_START + 5)
-NS_EVENT_MESSAGE(NS_SIMPLE_GESTURE_MAGNIFY_UPDATE, NS_SIMPLE_GESTURE_EVENT_START + 6)
+NS_EVENT_MESSAGE(eMagnifyGestureUpdate, NS_SIMPLE_GESTURE_EVENT_START + 6)
 NS_EVENT_MESSAGE(eMagnifyGesture,       NS_SIMPLE_GESTURE_EVENT_START + 7)
 NS_EVENT_MESSAGE(eRotateGestureStart,   NS_SIMPLE_GESTURE_EVENT_START + 8)
 NS_EVENT_MESSAGE(eRotateGestureUpdate,  NS_SIMPLE_GESTURE_EVENT_START + 9)
diff --git a/widget/android/nsWindow.cpp b/widget/android/nsWindow.cpp
index a85699bdbd2..249d5b71d41 100644
--- a/widget/android/nsWindow.cpp
+++ b/widget/android/nsWindow.cpp
@@ -1131,7 +1131,7 @@ nsWindow::OnNativeGestureEvent(AndroidGeckoEvent *ae)
             mLastDist = delta;
             break;
         case AndroidMotionEvent::ACTION_MAGNIFY:
-            msg = NS_SIMPLE_GESTURE_MAGNIFY_UPDATE;
+            msg = eMagnifyGestureUpdate;
             delta -= mLastDist;
             mLastDist += delta;
             break;
diff --git a/widget/cocoa/nsChildView.mm b/widget/cocoa/nsChildView.mm
index 889740bb000..9beabf5894b 100644
--- a/widget/cocoa/nsChildView.mm
+++ b/widget/cocoa/nsChildView.mm
@@ -4227,7 +4227,7 @@ NSEvent* gLastDragMouseDownEvent = nil;
     break;
 
   case eGestureState_MagnifyGesture:
-    msg = NS_SIMPLE_GESTURE_MAGNIFY_UPDATE;
+    msg = eMagnifyGestureUpdate;
     break;
 
   case eGestureState_None:
diff --git a/widget/windows/nsWinGesture.cpp b/widget/windows/nsWinGesture.cpp
index dc2c28afe94..96bb19fa20e 100644
--- a/widget/windows/nsWinGesture.cpp
+++ b/widget/windows/nsWinGesture.cpp
@@ -348,7 +348,7 @@ nsWinGesture::ProcessGestureMessage(HWND hWnd, WPARAM wParam, LPARAM lParam,
       else {
         // Send a zoom intermediate event, the delta is the change
         // in touch points.
-        evt.mMessage = NS_SIMPLE_GESTURE_MAGNIFY_UPDATE;
+        evt.mMessage = eMagnifyGestureUpdate;
         // (positive for a "zoom in")
         evt.delta = -1.0 * (mZoomIntermediate - (float)gi.ullArguments);
         mZoomIntermediate = (float)gi.ullArguments;