diff --git a/MAPINFO b/MAPINFO
index 737e4c4..91b51e1 100644
--- a/MAPINFO
+++ b/MAPINFO
@@ -38,9 +38,16 @@ map XE1M2 lookup HUSTR_XE1M2 {
 map XE1M3 lookup HUSTR_XE1M3 {
 	Cluster = 11
 	InterMusic = D_HGAINT
+	Next = XE1M4
 	Sky1 = "CJSKY3A"
 }
 
+map XE1M4 lookup HUSTR_XE1M4 {
+	Cluster = 11
+	InterMusic = D_HGAINT
+	Sky1 = "FVOID"
+}
+
 DoomEdNums {
 	2001 = LargeZorcherHGA
 	2002 = RapidZorcherHGA