diff --git a/lib/Makefile b/lib/Makefile
index c26536d..2d969a3 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -43,6 +43,7 @@
 COBJS-y += ldiv.o
 COBJS-$(CONFIG_MD5) += md5.o
 COBJS-y += net_utils.o
+COBJS-y += qsort.o
 COBJS-$(CONFIG_SHA1) += sha1.o
 COBJS-$(CONFIG_SHA256) += sha256.o
 COBJS-y += string.o