diff --git a/apps/telnetd/Makefile.telnetd b/apps/telnetd/Makefile.telnetd
index ba10629b9..ec2f6c7b6 100644
--- a/apps/telnetd/Makefile.telnetd
+++ b/apps/telnetd/Makefile.telnetd
@@ -1,3 +1,3 @@
-telnetd_src = telnetd.c shell.c
+telnetd_src = telnetd.c memb.c shell.c
 telnetd_dsc = telnetd-dsc.c
 APPDIRS += $(CONTIKI)/apps/shell