diff --git a/lumps/textures/Makefile b/lumps/textures/Makefile
index 23be1a69..160623c6 100644
--- a/lumps/textures/Makefile
+++ b/lumps/textures/Makefile
@@ -4,8 +4,7 @@ CPP=../../scripts/simplecpp
 all: phase1/texture1.lmp phase2/texture1.lmp freedm/texture1.lmp
 
 phase1/texture1.lmp: textures.cfg
-	$(CPP) -DDOOM1 -DULTDOOM -DDOOM1_VERSIONS                \
-	       < textures.cfg |                                  \
+	$(CPP) -DDOOM1_VERSIONS < textures.cfg |                 \
 	./build-textures -compat_texture1=doom1/texture1.txt     \
 	                 -compat_texture2=doom1/texture2.txt     \
 	                 -compat_pnames=doom1/pnames.txt         \
@@ -19,7 +18,7 @@ phase1/texture1.lmp: textures.cfg
 	cp phase1/pnames.lmp   ../fd1pname.lmp
 
 phase2/texture1.lmp: textures.cfg
-	$(CPP) -DDOOM1 -DDOOM2 < textures.cfg |                  \
+	$(CPP) < textures.cfg |                                  \
 	./build-textures -compat_texture1=doom2/texture1.txt     \
 	                 -compat_pnames=doom2/pnames.txt         \
 	                 -output_texture1=phase2/texture1.lmp    \
@@ -30,7 +29,7 @@ phase2/texture1.lmp: textures.cfg
 	cp phase2/pnames.lmp   ../fd2pname.lmp
 
 freedm/texture1.lmp: textures.cfg
-	$(CPP) -DDOOM1 -DDOOM2 -DFREEDM < textures.cfg |         \
+	$(CPP) -DFREEDM < textures.cfg |                         \
 	./build-textures -compat_texture1=doom2/texture1.txt     \
 	                 -compat_pnames=doom2/pnames.txt         \
 	                 -output_texture1=freedm/texture1.lmp    \
@@ -48,3 +47,4 @@ clean:
 	rm -f ../fd1txtr1.lmp ../fd1txtr2.lmp ../fd1pname.lmp \
 	      ../fd2txtr1.lmp ../fd2pname.lmp                 \
 	      ../fdmtxtr1.lmp ../fdmpname.lmp
+
diff --git a/lumps/textures/textures.cfg b/lumps/textures/textures.cfg
index 6b29e17e..59d13336 100644
--- a/lumps/textures/textures.cfg
+++ b/lumps/textures/textures.cfg
@@ -9,28 +9,15 @@
 ; to allow specific sets of textures to be turned on or off.
 ; The following #defines are understood:
 ;
-;    DOOM1 - Include textures that were available in doom.wad
-;    DOOM2 - Include textures that were available in doom2.wad
-;    ULTDOOM - Include doom.wad textures added in the Ultimate Doom
 ;    FREEDM - Include extra textures used in FreeDM
 ;    DOOM1_VERSIONS - Some textures differ between doom.wad and doom2.wad
 ;                     versions. Usually we use the doom2.wad version; this
 ;                     specifies to use the doom.wad version instead.
 ;
-; Usually we always build with -DDOOM1 -DDOOM2 regardless of the IWAD
-; being built: there's no reason not to include the full set of textures
-; from both original WADs.
+; Apart from the above exceptions, we always include the full set of
+; textures in all IWADs; there's no reason not to.
 ;
 
-#ifdef FREEDM
-#define DOOM1
-#define DOOM2
-#endif
-
-#ifdef DOOM2
-#undef ULTDOOM
-#endif
-
 ; the AA* textures have to be first, some ports (glboom) rely
 ; on it