diff --git a/as1/README.md b/as1/README.md
index 6b61ab8..4119cf1 100644
--- a/as1/README.md
+++ b/as1/README.md
@@ -15,6 +15,7 @@ generate the build files:
 ```sh
 cd as1
 mkdir -p build
+cd build
 cmake ..
 ```