diff --git a/modules/desktop_capture/desktop_capture_types.h b/modules/desktop_capture/desktop_capture_types.h
index 4dcfc82..bc26db7 100644
--- a/modules/desktop_capture/desktop_capture_types.h
+++ b/modules/desktop_capture/desktop_capture_types.h
@@ -27,9 +27,14 @@
 //   - On Windows: integer display device index.
 //   - On OSX: CGDirectDisplayID cast to intptr_t.
 //   - On Linux (with X11): TBD.
+//   - On ChromeOS: display::Display::id() is an int64_t.
 // On Windows, ScreenId is implementation dependent: sending a ScreenId from one
 // implementation to another usually won't work correctly.
-typedef intptr_t ScreenId;
+#if defined(CHROMEOS)
+  typedef int64_t ScreenId;
+#else
+  typedef intptr_t ScreenId;
+#endif
 
 // The screen id corresponds to all screen combined together.
 const ScreenId kFullDesktopScreenId = -1;
diff --git a/modules/desktop_capture/desktop_capturer.h b/modules/desktop_capture/desktop_capturer.h
index 8a65e57..822a75d 100644
--- a/modules/desktop_capture/desktop_capturer.h
+++ b/modules/desktop_capture/desktop_capturer.h
@@ -59,7 +59,11 @@
     virtual ~Callback() {}
   };
 
+#if defined(CHROMEOS)
+  typedef int64_t SourceId;
+#else
   typedef intptr_t SourceId;
+#endif
 
   static_assert(std::is_same<SourceId, ScreenId>::value,
                 "SourceId should be a same type as ScreenId.");