diff --git a/lib/Makefile b/lib/Makefile
index 7ab486b..6f675c6 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -35,6 +35,7 @@
   lib-y += dec_and_lock.o
 endif
 
+obj-$(CONFIG_BITREVERSE) += bitrev.o
 obj-$(CONFIG_CRC_CCITT)	+= crc-ccitt.o
 obj-$(CONFIG_CRC16)	+= crc16.o
 obj-$(CONFIG_CRC32)	+= crc32.o