diff --git a/qemu/include/qemu/bswap.h b/qemu/include/qemu/bswap.h
index 37990b07..52cdef93 100644
--- a/qemu/include/qemu/bswap.h
+++ b/qemu/include/qemu/bswap.h
@@ -171,12 +171,6 @@ CPU_CONVERT(le, 16, uint16_t)
 CPU_CONVERT(le, 32, uint32_t)
 CPU_CONVERT(le, 64, uint64_t)
 
-/* len must be one of 1, 2, 4 */
-static inline uint32_t qemu_bswap_len(uint32_t value, int len)
-{
-    return bswap32(value) >> (32 - 8 * len);
-}
-
 /* Unions for reinterpreting between floats and integers.  */
 
 typedef union {