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-rw-r--r--docs/reference/ingest/ingest-node.asciidoc2
1 files changed, 1 insertions, 1 deletions
diff --git a/docs/reference/ingest/ingest-node.asciidoc b/docs/reference/ingest/ingest-node.asciidoc
index ec641383be..ce50f27451 100644
--- a/docs/reference/ingest/ingest-node.asciidoc
+++ b/docs/reference/ingest/ingest-node.asciidoc
@@ -822,7 +822,7 @@ This is because the date is being rounded by month.
| Name | Required | Default | Description
| `field` | yes | - | The field to get the date or timestamp from.
| `index_name_prefix` | no | - | A prefix of the index name to be prepended before the printed date.
-| `date_rounding` | yes | - | How to round the date when formatting the date into the index name. Valid values are: `y` (year), `m` (month), `w` (week), `d` (day), `h` (hour), `m` (minute) and `s` (second).
+| `date_rounding` | yes | - | How to round the date when formatting the date into the index name. Valid values are: `y` (year), `M` (month), `w` (week), `d` (day), `h` (hour), `m` (minute) and `s` (second).
| `date_formats ` | no | yyyy-MM-dd'T'HH:mm:ss.SSSZ | An array of the expected date formats for parsing dates / timestamps in the document being preprocessed. Can be a Joda pattern or one of the following formats: ISO8601, UNIX, UNIX_MS, or TAI64N.
| `timezone` | no | UTC | The timezone to use when parsing the date and when date math index supports resolves expressions into concrete index names.
| `locale` | no | ENGLISH | The locale to use when parsing the date from the document being preprocessed, relevant when parsing month names or week days.