diff --git a/prboom2/src/dsda/udmf.cpp b/prboom2/src/dsda/udmf.cpp
index e34cf6eb4..f3dbf04a2 100644
--- a/prboom2/src/dsda/udmf.cpp
+++ b/prboom2/src/dsda/udmf.cpp
@@ -828,7 +828,7 @@ static void dsda_ParseUDMFIdentifier(Scanner &scanner) {
     scanner.MustGetToken('=');
     scanner.MustGetToken(TK_StringConst);
 
-    if (stricmp(scanner.string, "zdoom"))
+    if (stricmp(scanner.string, "zdoom") && stricmp(scanner.string, "dsda"))
       scanner.ErrorF("Unknown UDMF namespace \"%s\"", scanner.string);
 
     scanner.MustGetToken(';');