diff --git a/wadsrc/static/compatibility.txt b/wadsrc/static/compatibility.txt
index d21f0bfa2..ca465c550 100644
--- a/wadsrc/static/compatibility.txt
+++ b/wadsrc/static/compatibility.txt
@@ -140,6 +140,7 @@ CA267398C9B3A8F79349D3394F8B2106 // map20
 	nombf21
 }
 
+62C723647C531A15F5647BA8B4818392 // riii.wad map11
 178605D81D8E8C4B78D91BC72C8A89ED // ht.wad map31
 {
 	nombf21