diff --git a/targets/ARCH/tcp_bridge/README.tcp_bridge_oai b/targets/ARCH/tcp_bridge/README.tcp_bridge_oai
index ef0588ddee..103ba32123 100644
--- a/targets/ARCH/tcp_bridge/README.tcp_bridge_oai
+++ b/targets/ARCH/tcp_bridge/README.tcp_bridge_oai
@@ -4,6 +4,7 @@ To build the basic simulator:
     cd [openair top directory]
     . oaienv
     cd cmake_targets
+    ./build_oai -I -w USRP
     ./build_oai --basic-simulator
     cd ../common/utils/T/tracer
     make