diff --git a/doc/developer/topotests.rst b/doc/developer/topotests.rst
index 3e8987f126..16901c08ab 100644
--- a/doc/developer/topotests.rst
+++ b/doc/developer/topotests.rst
@@ -21,6 +21,7 @@ Installing Mininet Infrastructure
    apt-get install mininet
    apt-get install python-pip
    apt-get install iproute
+   apt-get install iperf
    pip install ipaddr
    pip install "pytest<5"
    pip install exabgp==3.4.17 (Newer 4.0 version of exabgp is not yet