diff --git a/configure.ac b/configure.ac
index 492803bc..b07f160e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -158,9 +158,9 @@ XORG_CFLAGS="$XORG_CFLAGS $PCIACCESS_CFLAGS"
 
 # Checks for headers/macros for byte swapping
 # Known variants:
-#	<byteswap.h> bswap_16, bswap_32, bswap_64  (glibc)
+#	<byteswap.h> bswap_16, bswap_32 (glibc)
 #	<sys/endian.h> __swap16, __swap32, __swap64 (OpenBSD)
-#	<sys/endian.h> bswap16, bswap32, bswap64 (other BSD's)
+#	<sys/endian.h> bswap16, bswap32 (other BSD's)
 #	and a fallback to local macros if none of the above are found
 
 # if <byteswap.h> is found, assume it's the correct version
@@ -211,8 +211,6 @@ b = bswap16(a);
 			[Define to 16-bit byteswap macro])
 	    AC_DEFINE_UNQUOTED([radeon_bswap_32], ${BSWAP}32,
 			[Define to 32-bit byteswap macro])
-	    AC_DEFINE_UNQUOTED([radeon_bswap_64], ${BSWAP}64,
-			[Define to 64-bit byteswap macro])
 	fi
 fi
 
diff --git a/src/radeon.h b/src/radeon.h
index 7ee15cdf..b938e8a3 100644
--- a/src/radeon.h
+++ b/src/radeon.h
@@ -108,7 +108,6 @@ struct _SyncFence;
 #include <byteswap.h>
 #define radeon_bswap_16 bswap_16
 #define radeon_bswap_32 bswap_32
-#define radeon_bswap_64 bswap_64
 #elif defined(USE_SYS_ENDIAN_H)
 #include <sys/endian.h>
 #else
@@ -119,22 +118,12 @@ struct _SyncFence;
         (((uint32_t)radeon_bswap_16((uint16_t)((value) & 0xffff)) << 16) | \
         (uint32_t)radeon_bswap_16((uint16_t)((value) >> 16)))
 
-#define radeon_bswap_64(value) \
-        (((uint64_t)radeon_bswap_32((uint32_t)((value) & 0xffffffff)) \
-            << 32) | \
-        (uint64_t)radeon_bswap_32((uint32_t)((value) >> 32)))
 #endif
 
 #if X_BYTE_ORDER == X_BIG_ENDIAN
-#define le32_to_cpu(x) radeon_bswap_32(x)
-#define le16_to_cpu(x) radeon_bswap_16(x)
 #define cpu_to_le32(x) radeon_bswap_32(x)
-#define cpu_to_le16(x) radeon_bswap_16(x)
 #else
-#define le32_to_cpu(x) (x)
-#define le16_to_cpu(x) (x)
 #define cpu_to_le32(x) (x)
-#define cpu_to_le16(x) (x)
 #endif
 
 /* Provide substitutes for gcc's __FUNCTION__ on other compilers */