diff --git a/src/lib/libflac/libflac/bitreader.c b/src/lib/libflac/libflac/bitreader.c
index b08a358ca4b..87d8f71365e 100644
--- a/src/lib/libflac/libflac/bitreader.c
+++ b/src/lib/libflac/libflac/bitreader.c
@@ -143,11 +143,13 @@ struct FLAC__BitReader {
 };
 
 
+#ifdef LSB_FIRST
 static FLAC__uint32 local_swap32_(FLAC__uint32 x)
 {
 	x = ((x<<8)&0xFF00FF00) | ((x>>8)&0x00FF00FF);
 	return (x>>16) | (x<<16);
 }
+#endif
 
 #if defined(_MSC_VER) && defined(_M_IX86)
 /* OPT: an MSVC built-in would be better */
diff --git a/src/lib/libflac/libflac/bitwriter.c b/src/lib/libflac/libflac/bitwriter.c
index b3fa0c4a8ab..85754858be6 100644
--- a/src/lib/libflac/libflac/bitwriter.c
+++ b/src/lib/libflac/libflac/bitwriter.c
@@ -112,12 +112,13 @@ struct FLAC__BitWriter {
 
 
 /* OPT: an MSVC built-in would be better */
+#ifdef LSB_FIRST
 static FLAC__uint32 local_swap32_(FLAC__uint32 x)
 {
 	x = ((x<<8)&0xFF00FF00) | ((x>>8)&0x00FF00FF);
 	return (x>>16) | (x<<16);
 }
-
+#endif
 
 /* * WATCHOUT: The current implementation only grows the buffer. */
 static FLAC__bool bitwriter_grow_(FLAC__BitWriter *bw, unsigned bits_to_add)