diff --git a/src/f2fs/f2fs_fs.h b/src/f2fs/f2fs_fs.h
index bf11add..8763836 100644
--- a/src/f2fs/f2fs_fs.h
+++ b/src/f2fs/f2fs_fs.h
@@ -147,7 +147,9 @@ struct compress_ctx {
 
 #if HAVE_BYTESWAP_H
 #include <byteswap.h>
-#else
+#endif
+
+#ifndef bswap_16
 /**
  * bswap_16 - reverse bytes in a uint16_t value.
  * @val: value whose bytes to swap.
@@ -161,7 +163,9 @@ static inline uint16_t bswap_16(uint16_t val)
 	return ((val & (uint16_t)0x00ffU) << 8)
 		| ((val & (uint16_t)0xff00U) >> 8);
 }
+#endif
 
+#ifndef bswap_32
 /**
  * bswap_32 - reverse bytes in a uint32_t value.
  * @val: value whose bytes to swap.
@@ -177,9 +181,9 @@ static inline uint32_t bswap_32(uint32_t val)
 		| ((val & (uint32_t)0x00ff0000UL) >>  8)
 		| ((val & (uint32_t)0xff000000UL) >> 24);
 }
-#endif /* !HAVE_BYTESWAP_H */
+#endif
 
-#if defined HAVE_DECL_BSWAP_64 && !HAVE_DECL_BSWAP_64
+#ifndef bswap_64
 /**
  * bswap_64 - reverse bytes in a uint64_t value.
  * @val: value whose bytes to swap.