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-rw-r--r--Docs/source/usage/parameters.rst2
1 files changed, 1 insertions, 1 deletions
diff --git a/Docs/source/usage/parameters.rst b/Docs/source/usage/parameters.rst
index 11d703d4b..60204b3bd 100644
--- a/Docs/source/usage/parameters.rst
+++ b/Docs/source/usage/parameters.rst
@@ -631,7 +631,7 @@ Particle initialization
* ``gaussian_beam``: Inject particle beam with gaussian distribution in
space in all directions. This requires additional parameters:
- ``<species_name>.q_tot`` (beam charge) optional (default is ``q_tot=0``),
+ ``<species_name>.q_tot`` (beam charge),
``<species_name>.npart`` (number of particles in the beam),
``<species_name>.x/y/z_m`` (average position in `x/y/z`),
``<species_name>.x/y/z_rms`` (standard deviation in `x/y/z`),