diff --git a/README.rst b/README.rst
index 5c0206466a05279f134cdb15395a9f680d40ee71..b366b908e69bf68ddeaabd4a292d7021a30989e5 100644
--- a/README.rst
+++ b/README.rst
@@ -257,7 +257,7 @@ Afterwards, please run variations of the following command:
 
     .. code:: bash
 
-        python ${TURTLE REPOSITORY}/tests/DNS/test_scaling.py D \
+        python ${TURTLE_REPOSITORY}/tests/DNS/test_scaling.py D \
             -n 128 \
             --nprocesses 4 \
             --ncores 1 \