diff --git a/README.osd b/README.osd
index 77e10a6..03980a2 100644
--- a/README.osd
+++ b/README.osd
@@ -30,6 +30,10 @@ Or, with IB, but shared libs will not work:
 To build kernel module, add:
     --with-kernel=/usr/src/linux
 
+On opt, with IB and kernel:
+
+    CFLAGS="-O3 -DNDEBUG" ./configure --without-openssl --disable-karma --disable-thread-safety --enable-strict --disable-static --enable-shared --prefix=$(pwd)/install --with-openib=/usr --without-bmi-tcp --with-kernel=/home/pw/src/osd/linux
+
 Then to build and install locally, in ./install:
     make
     make install