diff --git a/docs/source/devguide/docbuild.rst b/docs/source/devguide/docbuild.rst
index f723db06ea..cda0307cae 100644
--- a/docs/source/devguide/docbuild.rst
+++ b/docs/source/devguide/docbuild.rst
@@ -14,6 +14,11 @@ Python API. That is, from the root directory of the OpenMC repository:
 
     python -m pip install ".[docs]"
 
+The OpenMC documentation also uses Doxygen to automatically generate its
+C/C++ API documentation directly from the docstrings available in the source
+code. You will need to have a working installation of Doxygen to generate the
+documentation locally.
+
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 Building Documentation as a Webpage
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