--- pngconf.h.orig	2007-10-04 15:53:09.000000000 +0400
+++ pngconf.h	2007-10-13 17:31:06.000000000 +0400
@@ -737,7 +737,7 @@
 #  endif
 #endif
 
-#if defined(PNG_READ_SUPPORTED) && !defined(PNG_NO_ASSEMBLER_CODE)
+#if defined(PNG_READ_SUPPORTED) && !defined(PNG_NO_ASSEMBLER_CODE) && defined(__i386__)
 #  ifndef PNG_ASSEMBLER_CODE_SUPPORTED
 #    define PNG_ASSEMBLER_CODE_SUPPORTED
 #  endif
