diff --git a/common/kaitai/kaitaistream.cpp b/common/kaitai/kaitaistream.cpp
index e756613..c91493f 100644
--- a/common/kaitai/kaitaistream.cpp
+++ b/common/kaitai/kaitaistream.cpp
@@ -19,6 +19,11 @@
 #define bswap_16(x) _byteswap_ushort(x)
 #define bswap_32(x) _byteswap_ulong(x)
 #define bswap_64(x) _byteswap_uint64(x)
+#elif defined(__FreeBSD__)
+#include <sys/endian.h>
+#define bswap_16(x) bswap16(x)
+#define bswap_32(x) bswap32(x)
+#define bswap_64(x) bswap64(x)
 #else // !__APPLE__ or !_MSC_VER
 #include <endian.h>
 #include <byteswap.h>