diff --git a/wadsrc/static/compatibility.txt b/wadsrc/static/compatibility.txt
index a5fbe691a..59e7f9149 100644
--- a/wadsrc/static/compatibility.txt
+++ b/wadsrc/static/compatibility.txt
@@ -197,6 +197,7 @@ BA4860C7A2F5D705DB32A1A38DB77EC4 // pl2.wad map10
 EDA5CE7C462BD171BF8110AC56B67857 // pl2.wad map11
 A9A9A728E689266939C1B71655F320CA // pl2.wad map25
 62CA74092FC88C1E7FE2D0B1A8034E29 // pl2.wad map29
+19E1CFD717FC6BBA9371F0F529B4CDFF // ur_final.wad map27
 {
 	rebuildnodes
 }