--- ./mdadm.h.orig
+++ ./mdadm.h
@@ -104,12 +104,15 @@
  * and there is no standard conversion function so... */
 /* And dietlibc doesn't think byteswap is ok, so.. */
 /*  #include <byteswap.h> */
+#undef bswap_16
 #define bswap_16(x) (((x) & 0x00ffU) << 8 | \
 		     ((x) & 0xff00U) >> 8)
+#undef bswap_32
 #define bswap_32(x) (((x) & 0x000000ffU) << 24 | \
 		     ((x) & 0xff000000U) >> 24 | \
 		     ((x) & 0x0000ff00U) << 8  | \
 		     ((x) & 0x00ff0000U) >> 8)
+#undef bswap_64
 #define bswap_64(x) (((x) & 0x00000000000000ffULL) << 56 | \
 		     ((x) & 0xff00000000000000ULL) >> 56 | \
 		     ((x) & 0x000000000000ff00ULL) << 40 | \