diff --git a/README.md b/README.md
index eb3c8fb24..744213f12 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@ cmake --build build
 ```
 
 ## Testing
-Launch KolibriOS with the mounted `SDK_TOOLCHAIN_DIR` directory:
+Launch KolibriOS with the mounted `SDK_SYSROOT_DIR` directory:
 ```sh
 ./run-kos.sh
 ```