diff --git a/sc2/build/unix/build.config b/sc2/build/unix/build.config
index 9cea39fec..60857bea8 100644
--- a/sc2/build/unix/build.config
+++ b/sc2/build/unix/build.config
@@ -198,7 +198,6 @@ uqm_prepare_config()
 	CHOICE_graphics_OPTION_pure_TITLE="Don't include OpenGL graphics support"
 	CHOICE_graphics_OPTION_pure_ACTION='graphics_pure_action'
 	graphics_pure_action() {
-		CFLAGS="$CFLAGS -DGFXMODULE_SDL"
 		GFXMODULE_SDL=1
 		HAVE_OPENGL=0
 	}
@@ -206,7 +205,7 @@ uqm_prepare_config()
 	CHOICE_graphics_OPTION_opengl_ACTION='graphics_opengl_action'
 	CHOICE_graphics_OPTION_opengl_PRECOND="have_library opengl"
 	graphics_opengl_action() {
-		CFLAGS="$CFLAGS -DGFXMODULE_SDL -DHAVE_OPENGL"
+		CFLAGS="$CFLAGS -DHAVE_OPENGL"
 		GFXMODULE_SDL=1
 		HAVE_OPENGL=1
 		use_library opengl
@@ -218,14 +217,13 @@ uqm_prepare_config()
 	CHOICE_sound_OPTION_mixsdl_TITLE="Use MixSDL for sound (internal)"
 	CHOICE_sound_OPTION_mixsdl_ACTION=sound_mixsdl_action
 	sound_mixsdl_action() {
-		CFLAGS="$CFLAGS -DSOUNDMODULE_SDL"
 		SOUNDMODULE=mixsdl
 	}
 	CHOICE_sound_OPTION_openal_TITLE="Include OpenAL support (experimental)"
 	CHOICE_sound_OPTION_openal_PRECOND="have_library openal"
 	CHOICE_sound_OPTION_openal_ACTION=sound_openal_action
 	sound_openal_action() {
-		CFLAGS="$CFLAGS -DHAVE_OPENAL -DSOUNDMODULE_SDL"
+		CFLAGS="$CFLAGS -DHAVE_OPENAL"
 		SOUNDMODULE=openal
 		use_library openal
 	}