diff --git a/src/native/macosx/Makefile b/src/native/macosx/Makefile
index 7c686f97..f6c65dbf 100644
--- a/src/native/macosx/Makefile
+++ b/src/native/macosx/Makefile
@@ -1,9 +1,14 @@
 CC=gcc
 LINKER=gcc
 STRIP=strip
-CFLAGS_LINK=-dynamiclib -Wall
+# Replace SDK_ROOT and ARCHS with the following to enable universal binary build
+#SDK_ROOT=/Developer/SDKs/MacOSX10.4u.sdk
+#ARCHS=-arch i386 -arch ppc
+SDK_ROOT=/
+ARCHS=
+CFLAGS_LINK=-Wl,-syslibroot,$(SDK_ROOT) $(ARCHS) -dynamiclib -Wall
 FRAMEWORKS=-framework Foundation -framework AppKit -framework JavaVM -framework Carbon
-CFLAGS_O=-fPIC -O2 -D_MACOSX -Wall -c -I${AL}/include -I../common -I/System/Library/Frameworks/JavaVM.framework/Versions/A/Headers
+CFLAGS_O=-isysroot $(SDK_ROOT) $(ARCHS) -fPIC -O2 -D_MACOSX -Wall -c -I${AL}/include -I../common -I$(SDK_ROOT)/System/Library/Frameworks/JavaVM.framework/Versions/A/Headers
 SRC=$(wildcard *.m) $(wildcard *.c) $(wildcard ../common/*.c) $(wildcard ../generated/*.c)
 OBJECTS=$(subst .m,.o, $(subst .c,.o,$(SRC)))
 LIBRARY=liblwjgl.jnilib