diff --git a/src/nv_bios.c b/src/nv_bios.c
index 5b4f154..60ad377 100644
--- a/src/nv_bios.c
+++ b/src/nv_bios.c
@@ -23,7 +23,13 @@
  */
 
 #include "nv_include.h"
+
+#if defined(__FreeBSD__) || defined(__NetBSD__)
+#define bswap_16 bswap16
+#define bswap_32 bswap32
+#else
 #include <byteswap.h>
+#endif
 
 /* FIXME: put these somewhere */
 #define SEQ_INDEX VGA_SEQ_INDEX