--- a/bytesex.h
+++ b/bytesex.h
@@ -9,11 +9,15 @@
 
 #if 	defined(__i386__) \
 	|| defined(__alpha__) \
+	|| defined(__arm__) \
+	|| defined(__x86_64__) \
+	|| defined(__ia64__) \
 	|| (defined(__mips__) && (defined(MIPSEL) || defined (__MIPSEL__)))
 #define BYTE_ORDER_LITTLE_ENDIAN
 #elif 	defined(__mc68000__) \
 	|| defined (__sparc__) \
 	|| defined (__sparc) \
+	|| defined (__hppa__) \
 	|| defined (__PPC__) \
 	|| defined (__BIG_ENDIAN__) \
 	|| (defined(__mips__) && (defined(MIPSEB) || defined (__MIPSEB__)))