--- branches/release-1_3-branch/xvidcore/build/generic/configure.in	2011/01/06 14:08:06	1941
+++ branches/release-1_3-branch/xvidcore/build/generic/configure.in	2011/01/06 14:12:29	1942
@@ -428,8 +428,13 @@
 	       MARK_FUNCS=""
                ;;
            *darwin*)
-               AC_MSG_RESULT([macho])
-               NASM_FORMAT="macho"
+               if test "$ARCHITECTURE" = "X86_64" ; then
+                   AC_MSG_RESULT([macho64])
+                   NASM_FORMAT="macho64"
+               else
+                   AC_MSG_RESULT([macho32])
+                   NASM_FORMAT="macho32"
+               fi
                PREFIX="-DPREFIX"
                MARK_FUNCS=""
                ;;