diff --git a/src/mainboard/google/rex/variants/ovis/overridetree.cb b/src/mainboard/google/rex/variants/ovis/overridetree.cb
index bc10cd1a97..058a24088d 100644
--- a/src/mainboard/google/rex/variants/ovis/overridetree.cb
+++ b/src/mainboard/google/rex/variants/ovis/overridetree.cb
@@ -43,5 +43,10 @@ chip soc/intel/meteorlake
 				device i2c 50 on end
 			end
 		end
+		device ref soc_espi on
+			chip ec/google/chromeec
+				device pnp 0c09.0 on end
+			end
+		end
 	end
 end