diff -bur swftools-0.7.0/lib/png.c swftools-0.7.0-osx/lib/png.c
--- swftools-0.7.0/lib/png.c	2005-04-07 10:19:43.000000000 +0200
+++ swftools-0.7.0-osx/lib/png.c	2006-02-28 01:05:44.000000000 +0100
@@ -23,6 +23,7 @@
 #include <fcntl.h>
 #include <zlib.h>
 #include "png.h"
+#include "../config.h"
 
 typedef unsigned char U8;
 typedef unsigned long U32;
@@ -30,8 +31,13 @@
     U8 a,r,g,b;
 } COL;
 
+#ifdef WORDS_BIGENDIAN
+#define REVERSESWAP16(s) (s)
+#define REVERSESWAP32(s) (s)
+#else
 #define REVERSESWAP16(s) ((((s)>>8)&0x00ff)|(((s)<<8)&0xff00))
 #define REVERSESWAP32(s) (REVERSESWAP16(((s)>>16)&0x0000ffff)|((REVERSESWAP16(s)<<16)&0xffff0000))
+#endif
 
 int png_read_chunk(char (*head)[4], int*destlen, U8**destdata, FILE*fi)
 {