diff --git a/slides/problem.md b/slides/problem.md
index 84fb4d093da7f8ba055c6413ebb4c9612ce5f5eb..86148e3f4f5148404e8cdc12ee2918556602beae 100644
--- a/slides/problem.md
+++ b/slides/problem.md
@@ -645,7 +645,7 @@ But you can of course "install" Dune modules and DuMu^x^.
 * For Dune, CMake is triggered via the `dunecontrol` script
 
 ```sh
-dune-common/bin/dunecontrol [options] <command>
+./dune-common/bin/dunecontrol [options] <command>
 ```
 * useful commands:
     - `configure`: configure libraries, variables, paths, files