diff --git a/docs/ref/contrib/gis/functions.txt b/docs/ref/contrib/gis/functions.txt
index 4a6d6abe6a..b000f29d42 100644
--- a/docs/ref/contrib/gis/functions.txt
+++ b/docs/ref/contrib/gis/functions.txt
@@ -419,9 +419,7 @@ in the first linestring in the geometry field; otherwise returns ``None``.
 Oracle, SpatiaLite
 
 Accepts a single geographic field or expression and returns the perimeter of the
-geometry field as a :class:`~django.contrib.gis.measure.Distance` object. On
-MySQL, a raw float value is returned, as it's not possible to automatically
-determine the unit of the field.
+geometry field as a :class:`~django.contrib.gis.measure.Distance` object.
 
 ``PointOnSurface``
 ==================