diff --git a/res/GAMES.CONF b/res/GAMES.CONF
index 798dd61de..ab061ee77 100755
--- a/res/GAMES.CONF
+++ b/res/GAMES.CONF
@@ -453,7 +453,7 @@
 00010,S2=The Spy Strikes Back
 10000,VV=The Voyage of the Valkyrie
 00160,THEXDER=Thexder
-00011,THIEF=Thief
+10011,THIEF=Thief
 00010,THRESHOLD=Threshold
 00011,THUNDERBIRD.GX=Thunderbird GX
 00010,THUNDER.BOMBS=Thunder Bombs