diff --git a/docs/source/io_formats/source.rst b/docs/source/io_formats/source.rst
index cff77d2fa..6058241e1 100644
--- a/docs/source/io_formats/source.rst
+++ b/docs/source/io_formats/source.rst
@@ -13,8 +13,9 @@ is that documented here.
 :Attributes: - **filetype** (*char[]*) -- String indicating the type of file.
 
 :Datasets:
+
            - **source_bank** (Compound type) -- Source bank information for each
              particle. The compound type has fields ``wgt``, ``xyz``, ``uvw``,
-             ``E``, and ``delayed_group``, which represent the weight, position,
-             direction, energy, energy group, and delayed_group of the source
-             particle, respectively.
+             ``E``, ``delayed_group``, and ``particle``, which represent the
+             weight, position, direction, energy, energy group, delayed group,
+             and type of the source particle, respectively.