diff --git a/overlay/OPlusSystemUIResTarget/res/values/dimens.xml b/overlay/OPlusSystemUIResTarget/res/values/dimens.xml
index f037441..b0d35c7 100644
--- a/overlay/OPlusSystemUIResTarget/res/values/dimens.xml
+++ b/overlay/OPlusSystemUIResTarget/res/values/dimens.xml
@@ -8,6 +8,10 @@
     <!--  Allow CornerHandleView and PathSpecCornerPathRenderer to decouple from corner-radius -->
     <dimen name="config_rounded_mask_size">156px</dimen>
 
+    <!-- Microns/ums (1000 um = 1mm) per pixel for the given device. If unspecified, UI that
+         relies on this value will not be sized correctly. -->
+    <item name="pixel_pitch" format="float" type="dimen">48.3</item>
+
     <!-- the padding on the start of the statusbar -->
     <dimen name="status_bar_padding_start">0px</dimen>