diff --git a/wadsrc/static/compatibility.txt b/wadsrc/static/compatibility.txt
index 1bd031ed8..13f0d22a7 100644
--- a/wadsrc/static/compatibility.txt
+++ b/wadsrc/static/compatibility.txt
@@ -403,6 +403,7 @@ D0139194F7817BF06F3988DFC47DB38D // Whispers of Satan map29
 }
 
 D7F6E9F08C39A17026349A04F8C0B0BE // Return to Hadron, e1m9
+19D03FFC875589E21EDBB7AB74EF4AEF // Return to Hadron, e1m9, 2016.01.03 update
 {
 	pointonline
 }