diff --git a/doc/how_to_run.md b/doc/how_to_run.md
index 9a30673..42536e3 100644
--- a/doc/how_to_run.md
+++ b/doc/how_to_run.md
@@ -1,3 +1,5 @@
+# How to run from the source tree
+
 for Testers
 --------