diff --git a/docs/source_docs/inputs/InputsTimeStepping.rst b/docs/source_docs/inputs/InputsTimeStepping.rst
index 9dcb6e908264fb7652ddd2c05a34549b76e3cf60..104b6e887538afe2d5389479b4a813efa531a5f1 100644
--- a/docs/source_docs/inputs/InputsTimeStepping.rst
+++ b/docs/source_docs/inputs/InputsTimeStepping.rst
@@ -28,10 +28,10 @@ The following inputs must be preceded by "mfix.":
 +----------------------+-----------------------------------------------------------------------+-------------+--------------+
 | tcoll_ratio          | DEM timestep equals the min collision time divided by this value      |    Real     |   50.0       |
 +----------------------+-----------------------------------------------------------------------+-------------+--------------+
-| walltime_limit       | Write a check point file before the specified walltime (HH:MM:SS)     |    String   |   ""         |
-|                      | has been reached. For example, if mfix.walltime_limit = 0:10:00, then |             |              |
-|                      | timestepping is terminated just before runtime has reached the fixed  |             |              |
-|                      | walltime, and the code performs a clean exit                          |             |              |
+| walltime_limit       | Runtime limit specified with format HH:MM:SS. When the runtime has    |    String   |   ""         |
+|                      | almost reached the limit (approaching is computed by considering the  |             |              |
+|                      | average runtime needed for each step) then the simulation ends and    |             |              |
+|                      | a clean exit is performed                                             |             |              |
 +----------------------+-----------------------------------------------------------------------+-------------+--------------+
 | walltime_buffer      | This time value, specified as HH:MM:SS, is used to determine whether  |    String   |   ""         |
 |                      | to plot a checkpoint file before the job is terminated by the value   |             |              |