diff --git a/Makefile b/Makefile
index 9f62ede..946f1fd 100644
--- a/Makefile
+++ b/Makefile
@@ -30,6 +30,7 @@ t: test
 	mkdir $@
 	curl -Ss https://course.ccs.neu.edu/cs3700sp20/archive/tcp-sim.tgz | tar xzf - -C $@
 	sed -i '/.usr.bin.sudo/d' .netsim/netsim
+	cd .netsim; ln -s ../3700send .; ln -s ../3700recv .
 	cd /usr/include; h2ph -d $(HOME)/perl5/lib/perl5/ -a sys/syscall.h
 
 netsim-shell: .netsim