diff --git a/doc/stages/filters.python.rst b/doc/stages/filters.python.rst
index e3ebd7b275..3cc6829f87 100644
--- a/doc/stages/filters.python.rst
+++ b/doc/stages/filters.python.rst
@@ -14,7 +14,7 @@ filter and the ``outs`` array represents the points after filtering.
 
 .. warning::
     :ref:`filters.python` was called ``filters.programmable`` and
-    ``filters.predicate`` before Python 1.6. The functionality of
+    ``filters.predicate`` before PDAL 1.6. The functionality of
     ``filters.programmable`` and ``filters.predicate`` was rolled into
     :ref:`filters.python`, and the filter was renamed for clarity.