diff --git a/doc/install.rst b/doc/install.rst
index 095ca4c3..720aa387 100644
--- a/doc/install.rst
+++ b/doc/install.rst
@@ -37,6 +37,10 @@ Installation steps
 #. Make sure that you have added the TRIQS and Cpp2Py installation to your environment variables::
 
      $ source path_to_triqs/share/triqsvarsh.sh
+     
+#. In the build directory call cmake 
+
+     $ cmake ../src
  
 #. Compile the code, run the tests and install the application::