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-rw-r--r--package/utils/otrx/src/otrx.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/package/utils/otrx/src/otrx.c b/package/utils/otrx/src/otrx.c
index 131d8d6052..101a31004d 100644
--- a/package/utils/otrx/src/otrx.c
+++ b/package/utils/otrx/src/otrx.c
@@ -18,6 +18,10 @@
#include <string.h>
#include <unistd.h>
+#if !defined(__BYTE_ORDER)
+#error "Unknown byte order"
+#endif
+
#if __BYTE_ORDER == __BIG_ENDIAN
#define cpu_to_le32(x) bswap_32(x)
#define le32_to_cpu(x) bswap_32(x)