diff --git a/build/PackageDiffIgnore.xml b/build/PackageDiffIgnore.xml
index 97312a06ee627a008066e3ca70117e7e69ac2d53..68325dc021693f01ef29ac584e688ccc5f8d1175 100644
--- a/build/PackageDiffIgnore.xml
+++ b/build/PackageDiffIgnore.xml
@@ -9493,7 +9493,27 @@
 			<Member fullName="System.Void Windows.UI.Core.CoreWindow.RaisePointerCancelled(Windows.UI.Core.PointerEventArgs args)" reason="Does not exist in Windows" />
 		</Methods>
 	</IgnoreSet>
+	<IgnoreSet baseVersion="4.9">
+		<Types>
+		</Types>
+
+		<Events>
+		</Events>
 
+		<Fields>
+		</Fields>
+
+		<Properties>
+		</Properties>
+
+		<Methods>
+			<!-- BEGIN Proximity sensor -->
+			<Member fullName="System.Void Windows.Devices.Sensors.ProximitySensor..ctor()" reason="Does not exist in Windows" />
+			<Member fullName="System.Void Windows.Devices.Sensors.ProximitySensorReading..ctor()" reason="Does not exist in Windows" />
+			<Member fullName="System.Void Windows.Devices.Sensors.ProximitySensorReadingChangedEventArgs..ctor()" reason="Does not exist in Windows" />			
+			<!-- END Proximity sensor -->
+		</Methods>
+	</IgnoreSet>
 	  <!--
 	Supported nodes (please keep at the bottom of this file):
 	<IgnoreSet baseVersion="0.0">