diff --git a/src/maploader/udmf.cpp b/src/maploader/udmf.cpp
index 6601bf1f69..db34030de4 100644
--- a/src/maploader/udmf.cpp
+++ b/src/maploader/udmf.cpp
@@ -2477,6 +2477,7 @@ public:
 			namespc = sc.String;
 			switch(namespc.GetIndex())
 			{
+			case NAME_Dsda:
 			case NAME_ZDoom:
 			case NAME_Eternity:
 				namespace_bits = Zd;
diff --git a/src/namedef_custom.h b/src/namedef_custom.h
index 57dbefcba9..1beb0d2357 100644
--- a/src/namedef_custom.h
+++ b/src/namedef_custom.h
@@ -675,6 +675,7 @@ xx(ZDoomTranslated)
 xx(Vavoom)
 xx(GZDoom)
 xx(Eternity)
+xx(Dsda)
 
 xx(Xpanningfloor)
 xx(Ypanningfloor)