diff --git a/doc/source/api.rst b/doc/source/api.rst
index cb5136df1ff8b..83abd84d36eb4 100644
--- a/doc/source/api.rst
+++ b/doc/source/api.rst
@@ -1738,6 +1738,7 @@ application to columns of a specific data type.
    DataFrameGroupBy.diff
    DataFrameGroupBy.ffill
    DataFrameGroupBy.fillna
+   DataFrameGroupBy.filter
    DataFrameGroupBy.hist
    DataFrameGroupBy.idxmax
    DataFrameGroupBy.idxmin