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-rw-r--r--extras/volume_id/lib/md5.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/extras/volume_id/lib/md5.c b/extras/volume_id/lib/md5.c
index 0860660066..9c4b284644 100644
--- a/extras/volume_id/lib/md5.c
+++ b/extras/volume_id/lib/md5.c
@@ -20,7 +20,7 @@
#include "md5.h"
-#if !(__BYTE_ORDER == __LITTLE_ENDIAN) && !(__BYTE_ORDER == __BIG_ENDIAN)
+#if !defined __BYTE_ORDER || !(__BYTE_ORDER == __LITTLE_ENDIAN) && !(__BYTE_ORDER == __BIG_ENDIAN)
#error missing __BYTE_ORDER
#endif