diff --git a/webrtc/modules/desktop_capture/mac/desktop_configuration.h b/webrtc/modules/desktop_capture/mac/desktop_configuration.h
index 031d92de2..bb2339bb0 100644
--- a/webrtc/modules/desktop_capture/mac/desktop_configuration.h
+++ b/webrtc/modules/desktop_capture/mac/desktop_configuration.h
@@ -59,10 +59,11 @@ struct MacDesktopConfiguration {
   const MacDisplayConfiguration* FindDisplayConfigurationById(
       CGDirectDisplayID id);
 
-  // Bounds of the desktop in Density-Independent Pixels (DIPs).
+  // Bounds of the desktop excluding monitors with DPI settings different from
+  // the main monitor. In Density-Independent Pixels (DIPs).
   DesktopRect bounds;
 
-  // Bounds of the desktop in physical pixels.
+  // Same as bounds, but expressed in physical pixels.
   DesktopRect pixel_bounds;
 
   // Scale factor from DIPs to physical pixels.
diff --git a/webrtc/modules/desktop_capture/mac/desktop_configuration.mm b/webrtc/modules/desktop_capture/mac/desktop_configuration.mm
index 838973e42..35fa65be2 100644
--- a/webrtc/modules/desktop_capture/mac/desktop_configuration.mm
+++ b/webrtc/modules/desktop_capture/mac/desktop_configuration.mm
@@ -134,11 +134,15 @@ MacDesktopConfiguration MacDesktopConfiguration::GetCurrent(Origin origin) {
     // Add the display to the configuration.
     desktop_config.displays.push_back(display_config);
 
-    // Update the desktop bounds to account for this display.
-    desktop_config.bounds =
-        JoinRects(desktop_config.bounds, display_config.bounds);
-    desktop_config.pixel_bounds =
-        JoinRects(desktop_config.pixel_bounds, display_config.pixel_bounds);
+    // Update the desktop bounds to account for this display, unless the current
+    // display uses different DPI settings.
+    if (display_config.dip_to_pixel_scale ==
+        desktop_config.dip_to_pixel_scale) {
+      desktop_config.bounds =
+          JoinRects(desktop_config.bounds, display_config.bounds);
+      desktop_config.pixel_bounds =
+          JoinRects(desktop_config.pixel_bounds, display_config.pixel_bounds);
+    }
   }
 
   return desktop_config;