diff --git a/usage/sync-rules/operators-and-functions.mdx b/usage/sync-rules/operators-and-functions.mdx
index 3f4e7aee..147e55cb 100644
--- a/usage/sync-rules/operators-and-functions.mdx
+++ b/usage/sync-rules/operators-and-functions.mdx
@@ -45,6 +45,7 @@ Some fundamental restrictions on these operators and functions are:
 | [json\_valid(data)](https://www.sqlite.org/json1.html#jvalid)                    | Returns 1 if the data can be parsed as JSON, 0 otherwise.                                                                                                                                                                                                                                                                                                                                        |
 | json\_keys(data)                    | Returns the set of keys of a JSON object as a JSON array. Example: `select * from items where bucket.user_id in json_keys(permissions_json)`                                                                                                                                                                                                                                                                                                                                       |
 | [ifnull(x,y)](https://www.sqlite.org/lang_corefunc.html#ifnull)                | Returns x if non-null, otherwise returns y.                                                                                                                                                                                                                                                                                                                                                      |
+| [uuid_blob(id)](https://sqlite.org/src/file/ext/misc/uuid.c)                             | Convert a UUID string to bytes.                                                                                                                                                                                                                                                                                                                    |
 | [unixepoch(datetime, \[modifier\])](https://www.sqlite.org/lang_datefunc.html) | Returns a datetime as Unix timestamp. If modifier is "subsec", the result is a floating point number, with milliseconds including in the fraction. The datetime argument is required - this function cannot be used to get the current time.                                                                                                                                                     |
 | [datetime(datetime, \[modifier\])](https://www.sqlite.org/lang_datefunc.html)  | Returns a datetime as a datetime string, in the format YYYY-MM-DD HH:MM:SS. If the specifier is "subsec", milliseconds are also included. If the modifier is "unixepoch", the argument is interpreted as a unix timestamp. Both modifiers can be included: datetime(timestamp, 'unixepoch', 'subsec'). The datetime argument is required - this function cannot be used to get the current time. |
 | [ST\_AsGeoJSON(geometry)](https://postgis.net/docs/ST_AsGeoJSON.html)          | Convert [PostGIS](https://postgis.net/) (in Postgres) geometry from WKB to GeoJSON. Combine with JSON operators to extract specific fields.                                                                                                                                                                                                                                                      |
@@ -52,4 +53,5 @@ Some fundamental restrictions on these operators and functions are:
 | [ST\_X(point)](https://postgis.net/docs/ST_X.html)                             | Get the X coordinate of a [PostGIS](https://postgis.net/) point (in Postgres)                                                                                                                                                                                                                                                                                                                    |
 | [ST\_Y(point)](https://postgis.net/docs/ST_Y.html)                             | Get the Y coordinate of a [PostGIS](https://postgis.net/) point (in Postgres)                                                                                                                                                                                                                                                                                                                    |
 
+
 Most of these functions are based on the [built-in SQLite functions](https://www.sqlite.org/lang_corefunc.html) and [SQLite JSON functions](https://www.sqlite.org/json1.html).