diff --git a/Documentation/ProjectFile/prj/processes/process/StokesFlow/t_use_stokes_brinkman_form.md b/Documentation/ProjectFile/prj/processes/process/StokesFlow/t_use_stokes_brinkman_form.md
new file mode 100644
index 0000000000000000000000000000000000000000..a30fd1b14403a7579f1d7547fea316c2e10c5a8d
--- /dev/null
+++ b/Documentation/ProjectFile/prj/processes/process/StokesFlow/t_use_stokes_brinkman_form.md
@@ -0,0 +1 @@
+\copydoc ProcessLib::StokesFlow::StokesFlowProcessData::use_stokes_brinkman_form
diff --git a/ProcessLib/StokesFlow/StokesFlowProcessData.h b/ProcessLib/StokesFlow/StokesFlowProcessData.h
index 668d6cae4d938e95e5004a17a14e4e965f7bb1a7..0417237d0b53df6e100fd2bfd59957de5ad090e1 100644
--- a/ProcessLib/StokesFlow/StokesFlowProcessData.h
+++ b/ProcessLib/StokesFlow/StokesFlowProcessData.h
@@ -31,6 +31,8 @@ struct StokesFlowProcessData
     /// an external force that applies in the bulk of the fluid, like gravity.
     Eigen::VectorXd const specific_body_force;
 
+    /// When this optional field is flagged on, the Darcy term will be
+    /// additionally included in the original momentum balance equation.
     bool const use_stokes_brinkman_form;
 
     MeshLib::PropertyVector<double>* pressure_interpolated = nullptr;