diff --git a/atom/browser/native_window_mac.h b/atom/browser/native_window_mac.h
index 4d86ec337748..93d03e4c157c 100644
--- a/atom/browser/native_window_mac.h
+++ b/atom/browser/native_window_mac.h
@@ -126,7 +126,9 @@ class NativeWindowMac : public NativeWindow {
 
   base::scoped_nsobject<AtomNSWindow> window_;
   base::scoped_nsobject<AtomNSWindowDelegate> window_delegate_;
-  base::scoped_nsobject<id> event_monitor_;
+
+  // Event monitor for scroll wheel event.
+  id wheel_event_monitor_;
 
   // The view that will fill the whole frameless window.
   base::scoped_nsobject<FullSizeContentView> content_view_;
diff --git a/atom/browser/native_window_mac.mm b/atom/browser/native_window_mac.mm
index f69292e06074..7967a1771735 100644
--- a/atom/browser/native_window_mac.mm
+++ b/atom/browser/native_window_mac.mm
@@ -499,32 +499,34 @@ NativeWindowMac::NativeWindowMac(
   NSView* view = inspectable_web_contents()->GetView()->GetNativeView();
   [view setAutoresizingMask:NSViewWidthSizable | NSViewHeightSizable];
 
-  BOOL __block down = NO;
-  event_monitor_.reset([[NSEvent
+  // Use an NSEvent monitor to listen for the wheel event.
+  BOOL __block began = NO;
+  wheel_event_monitor_ = [NSEvent
     addLocalMonitorForEventsMatchingMask:NSScrollWheelMask
-    handler:^NSEvent * _Nullable(NSEvent * event) {
+    handler:^(NSEvent* event) {
       if ([[event window] windowNumber] != [window_ windowNumber])
         return event;
 
       if (!web_contents)
         return event;
 
-      if (!down && (([event phase] == NSEventPhaseMayBegin) || ([event phase] == NSEventPhaseBegan))) {
+      if (!began && (([event phase] == NSEventPhaseMayBegin) ||
+                     ([event phase] == NSEventPhaseBegan))) {
         this->NotifyWindowScrollTouchBegin();
-        down = YES;
-      }
-      if (down && (([event phase] == NSEventPhaseEnded) || ([event phase] == NSEventPhaseCancelled))) {
+        began = YES;
+      } else if (began && (([event phase] == NSEventPhaseEnded) ||
+                           ([event phase] == NSEventPhaseCancelled))) {
         this->NotifyWindowScrollTouchEnd();
-        down = NO;
+        began = NO;
       }
       return event;
-  }] retain]);
+  }];
 
   InstallView();
 }
 
 NativeWindowMac::~NativeWindowMac() {
-  [NSEvent removeMonitor: event_monitor_.get()];
+  [NSEvent removeMonitor:wheel_event_monitor_];
   Observe(nullptr);
 }
 
diff --git a/docs/api/browser-window.md b/docs/api/browser-window.md
index 6b8474662d7c..edda572e9ac6 100644
--- a/docs/api/browser-window.md
+++ b/docs/api/browser-window.md
@@ -307,6 +307,14 @@ someWindow.on('app-command', function(e, cmd) {
 });
 ```
 
+### Event: 'scroll-touch-begin' _OS X_
+
+Emitted when scroll wheel event phase has begun.
+
+### Event: 'scroll-touch-end' _OS X_
+
+Emitted when scroll wheel event phase has ended.
+
 ## Methods
 
 The `BrowserWindow` object has the following methods: