diff --git a/docs/codeql/codeql-cli/analyzing-databases-with-the-codeql-cli.rst b/docs/codeql/codeql-cli/analyzing-databases-with-the-codeql-cli.rst
index ce873869086..570067335a9 100644
--- a/docs/codeql/codeql-cli/analyzing-databases-with-the-codeql-cli.rst
+++ b/docs/codeql/codeql-cli/analyzing-databases-with-the-codeql-cli.rst
@@ -203,9 +203,10 @@ In the CodeQL workflow file, you can add ``packs`` as input for the ``init`` act
 
    uses: github/codeql-action@v1
    with:
-     packs: codeql/pack1@~1.2.3, codeql/pack2
+     packs: codeql/pack1@~1.2.3, +codeql/pack2
 
 This format does not support multi-language analyses.
+You can prefix a package reference with a plus sign, resulting in the input being combined with the config file. Without it, the input overwrites the config file.
 
 Running all queries in a directory
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~