diff --git a/components/serializer.rst b/components/serializer.rst
index 475b8458489..180b985c350 100644
--- a/components/serializer.rst
+++ b/components/serializer.rst
@@ -1027,7 +1027,7 @@ Option                  Description                                            D
                         line in the CSV file
 ``csv_escape_char``     Sets the escape character (at most one character)      empty string
 ``csv_key_separator``   Sets the separator for array's keys during its         ``.``
-                        flattening
+                        flattening (set to `false` to disable)
 ``csv_headers``         Sets the order of the header and data columns
                         E.g.: if ``$data = ['c' => 3, 'a' => 1, 'b' => 2]``
                         and ``$options = ['csv_headers' => ['a', 'b', 'c']]``