diff --git a/doc/src/fix_wall_gran.rst b/doc/src/fix_wall_gran.rst
index bc59fd71a7..1eefc4aeae 100644
--- a/doc/src/fix_wall_gran.rst
+++ b/doc/src/fix_wall_gran.rst
@@ -199,11 +199,11 @@ the following table:
 |     1 | 1.0 if particle is in contact with wall,           |                |
 |       | 0.0 otherwise                                      |                |
 +-------+----------------------------------------------------+----------------+
-|     2 | Force :math:`f_x` exerted on the wall              | force units    |
+|     2 | Force :math:`f_x` exerted by the wall              | force units    |
 +-------+----------------------------------------------------+----------------+
-|     3 | Force :math:`f_y` exerted on the wall              | force units    |
+|     3 | Force :math:`f_y` exerted by the wall              | force units    |
 +-------+----------------------------------------------------+----------------+
-|     4 | Force :math:`f_z` exerted on the wall              | force units    |
+|     4 | Force :math:`f_z` exerted by the wall              | force units    |
 +-------+----------------------------------------------------+----------------+
 |     5 | :math:`x`-coordinate of contact point on wall      | distance units |
 +-------+----------------------------------------------------+----------------+
diff --git a/doc/src/fix_wall_gran_region.rst b/doc/src/fix_wall_gran_region.rst
index bedf1165c1..9ed5bb7bcc 100644
--- a/doc/src/fix_wall_gran_region.rst
+++ b/doc/src/fix_wall_gran_region.rst
@@ -240,11 +240,11 @@ the following table:
 |     1 | 1.0 if particle is in contact with wall,           |                |
 |       | 0.0 otherwise                                      |                |
 +-------+----------------------------------------------------+----------------+
-|     2 | Force :math:`f_x` exerted on the wall              | force units    |
+|     2 | Force :math:`f_x` exerted by the wall              | force units    |
 +-------+----------------------------------------------------+----------------+
-|     3 | Force :math:`f_y` exerted on the wall              | force units    |
+|     3 | Force :math:`f_y` exerted by the wall              | force units    |
 +-------+----------------------------------------------------+----------------+
-|     4 | Force :math:`f_z` exerted on the wall              | force units    |
+|     4 | Force :math:`f_z` exerted by the wall              | force units    |
 +-------+----------------------------------------------------+----------------+
 |     5 | :math:`x`-coordinate of contact point on wall      | distance units |
 +-------+----------------------------------------------------+----------------+