diff --git a/README.rst b/README.rst
index 4870e79..0f19abb 100644
--- a/README.rst
+++ b/README.rst
@@ -10,6 +10,7 @@ Then you have to install cmake, for the serialmon.py script python and pyserial.
 
     cd reflow
     mkdir build
+    cd build
     cmake ..
     make
     make reflowctl-upload