diff --git a/Makefile b/Makefile
index 015768d0..9ada65fb 100644
--- a/Makefile
+++ b/Makefile
@@ -118,6 +118,14 @@ $(WADS)/doom2.wad: wadinfo_iwad.txt subdirs force
 	rm -f $@
 	$(DEUTEX) $(DEUTEX_ARGS) -iwad -textures -lumps -patch -flats -sounds -musics -graphics -sprites -levels -build wadinfo_iwad.txt $@
 
+#---------------------------------------------------------
+# udoom iwad
+
+$(WADS)/doom.wad: wadinfo_ult.txt subdirs force
+	ln -sf doom/texture1.txt textures/texture1.txt
+	rm -f $@
+	$(DEUTEX) $(DEUTEX_ARGS) -iwad -textures -lumps -patch -flats -sounds -musics -graphics -sprites -levels -build wadinfo_ult.txt $@
+
 #---------------------------------------------------------
 # build levels wad