diff --git a/testsuite/tests/interface-stability/README.mkd b/testsuite/tests/interface-stability/README.mkd
index 9c229fb958bdd84479685e5d999c0a723c9b87ad..5a5274374f6fc9f5c75fafd82a07292f18f72828 100644
--- a/testsuite/tests/interface-stability/README.mkd
+++ b/testsuite/tests/interface-stability/README.mkd
@@ -22,7 +22,9 @@ which one can do this:
    others.  For instance:
    ```
    for f in testsuite/tests/interface-stability/base-exports.stdout-*; do
-     git show | sed -e "s/base-exports.stdout/$(basename $f)/" | patch -p1
+     git show testsuite/tests/interface-stability \
+       | sed -e "s/base-exports.stdout/$(basename $f)/" \
+       | patch -p1
    done
    ```
    In the case of conflicts, increasing the fuzz factor (using `-F`) can be