diff --git a/docs/source/examples_simple_2D.rst b/docs/source/examples_simple_2D.rst
index e4abc82d..836bf050 100644
--- a/docs/source/examples_simple_2D.rst
+++ b/docs/source/examples_simple_2D.rst
@@ -158,7 +158,7 @@ You should have produced 60 output files, one for each A-scan, with names ``cyli
 
 .. code-block:: none
 
-    python -m tools.outputfiles_merge user_models/cylinder_Bscan_2D 60
+    python -m tools.outputfiles_merge user_models/cylinder_Bscan_2D
 
 You should see a combined output file ``cylinder_Bscan_2D_merged.out``. The tool will ask you if you want to delete the original single A-scan output files or keep them.
 
diff --git a/docs/source/utils.rst b/docs/source/utils.rst
index 7bd80638..96f4c2e9 100644
--- a/docs/source/utils.rst
+++ b/docs/source/utils.rst
@@ -25,9 +25,8 @@ gprMax produces a separate output file for each trace (A-scan) in a B-scan. This
 
 .. code-block:: none
 
-    python -m tools.outputfiles_merge basefilename modelruns
+    python -m tools.outputfiles_merge basefilename
 
 where:
 
-* ``basefilename`` is the base name file of the output file series, e.g. for ``myoutput1.out``, ``myoutput2.out`` the base file name would be ``myoutput``
-* ``modelruns`` is the number of output files to combine
\ No newline at end of file
+* ``basefilename`` is the base name file of the output file series, e.g. for ``myoutput1.out``, ``myoutput2.out`` the base file name would be ``myoutput``
\ No newline at end of file