diff --git a/kdbg/README.md b/kdbg/README.md
index 1fd3a15b638a5124c9522896063ab0e3487f0117..85516ad4f7c4f4b23b043751098ad5a2e280e822 100644
--- a/kdbg/README.md
+++ b/kdbg/README.md
@@ -28,3 +28,13 @@ Install Kdbg. If you want to do a system-wide install, the command below must be
 make install
 ```
 
+To run `kdbg`, simply type `kdbg`.
+
+If you specified an install prefix during the cmake step above (with `-DCMAKE_INSTALL_PREFIX`), then you'll need to source `prefix.sh` before running `kdbg` otherwise it won't work properly:
+
+```
+cp prefix.sh install_dir/kdbg
+source install_dir/kdbg
+install_dir/kdg
+```
+