diff --git a/Documentation/ProjectFile/prj/process_variables/process_variable/source_terms/source_term/Line/c_Line.md b/Documentation/ProjectFile/prj/process_variables/process_variable/source_terms/source_term/Line/c_Line.md
new file mode 100644
index 0000000000000000000000000000000000000000..1bc35acd5c23978fefd95b303d1916acf02c9b69
--- /dev/null
+++ b/Documentation/ProjectFile/prj/process_variables/process_variable/source_terms/source_term/Line/c_Line.md
@@ -0,0 +1,3 @@
+Declares a source term that is defined on a line shaped sub-domain (line mesh).
+
+The user should carefully check which physical quantity that parameter is.
diff --git a/Documentation/ProjectFile/prj/process_variables/process_variable/source_terms/source_term/Line/t_parameter.md b/Documentation/ProjectFile/prj/process_variables/process_variable/source_terms/source_term/Line/t_parameter.md
new file mode 100644
index 0000000000000000000000000000000000000000..c8d721a55533cdfa72ed977a48b43a24e1a18a8d
--- /dev/null
+++ b/Documentation/ProjectFile/prj/process_variables/process_variable/source_terms/source_term/Line/t_parameter.md
@@ -0,0 +1,4 @@
+The name of the parameter that defines the value that should be used for the source
+term. Nodal parameters are not supported.
+
+The user should carefully check which physical quantity that parameter is.
diff --git a/ProcessLib/SourceTerms/CreateVolumetricSourceTerm.cpp b/ProcessLib/SourceTerms/CreateVolumetricSourceTerm.cpp
index b5f29bd0df8fad5e7809d6f3b855c60d1fe5f63c..e8fd98cd3c00edade59e0dcba4325217cd76f8c3 100644
--- a/ProcessLib/SourceTerms/CreateVolumetricSourceTerm.cpp
+++ b/ProcessLib/SourceTerms/CreateVolumetricSourceTerm.cpp
@@ -49,6 +49,9 @@ std::unique_ptr<SourceTerm> createVolumetricSourceTerm(
         volumetric_source_term_parameter_name, parameters, 1,
         &source_term_mesh);
 
+    // instruction to create documentation for the parameter
+    //! \ogs_file_param_special{prj__process_variables__process_variable__source_terms__source_term__Line__parameter}
+
     DBUG("Using '{:s}' as volumetric source term parameter.",
          volumetric_source_term.name);