diff --git a/include/my_global.h b/include/my_global.h
index 41b660227b5..2de54e521b5 100644
--- a/include/my_global.h
+++ b/include/my_global.h
@@ -84,6 +84,42 @@
 #define NETWARE_SET_SCREEN_MODE(A)
 #endif
 
+/*
+  The macros below are used to allow build of Universal/fat binaries of
+  MySQL and MySQL applications under darwin. 
+*/
+#ifdef TARGET_FAT_BINARY
+# undef SIZEOF_CHARP 
+# undef SIZEOF_INT 
+# undef SIZEOF_LONG 
+# undef SIZEOF_LONG_LONG 
+# undef SIZEOF_OFF_T 
+# undef SIZEOF_SHORT 
+
+#if defined(__i386__)
+# undef WORDS_BIGENDIAN
+# define SIZEOF_CHARP 4
+# define SIZEOF_INT 4
+# define SIZEOF_LONG 4
+# define SIZEOF_LONG_LONG 8
+# define SIZEOF_OFF_T 8
+# define SIZEOF_SHORT 2
+
+#elif defined(__ppc__)
+# define WORDS_BIGENDIAN
+# define SIZEOF_CHARP 4
+# define SIZEOF_INT 4
+# define SIZEOF_LONG 4
+# define SIZEOF_LONG_LONG 8
+# define SIZEOF_OFF_T 8
+# define SIZEOF_SHORT 2
+
+#else
+# error Building FAT binary for an unknown architecture.
+#endif
+#endif /* TARGET_FAT_BINARY */
+
+
 /*
   The macros below are borrowed from include/linux/compiler.h in the
   Linux kernel. Use them to indicate the likelyhood of the truthfulness