diff --git a/wadsrc/static/demolition/demolition.grpinfo b/wadsrc/static/demolition/demolition.grpinfo
index 7321f2e71..ecbd72e97 100644
--- a/wadsrc/static/demolition/demolition.grpinfo
+++ b/wadsrc/static/demolition/demolition.grpinfo
@@ -454,3 +454,15 @@ grpinfo
 	gamefilter "ShadowWarrior.TwinDragon"
 }
 
+grpinfo
+{
+	name "Shadow Warrior: Twin Dragon"
+	flags GAMEFLAG_SW|GAMEFLAG_ADDON
+	crc 0xB5B71277
+	size 6236287
+	defname "twindrag.def"	// included in the GRP
+	dependency SWREG12_CRC
+	gamefilter "ShadowWarrior.TwinDragon"
+}
+
+   
\ No newline at end of file