diff --git a/examples/ctr-example/lab.md b/examples/ctr-example/lab.md
index 2f1f9d9e..fb799170 100644
--- a/examples/ctr-example/lab.md
+++ b/examples/ctr-example/lab.md
@@ -38,6 +38,7 @@ Read through the sources:
 ## Build and run the example
 
 ```bash
+$ cd examples/ctr-example
 $ make
 $ ./ctr-example
 ```