diff --git a/API-changes-between-v2.0-and-v2.1.md b/API-changes-between-v2.0-and-v2.1.md
index 933b849..b026ed2 100644
--- a/API-changes-between-v2.0-and-v2.1.md
+++ b/API-changes-between-v2.0-and-v2.1.md
@@ -19,7 +19,7 @@
  * `MarkersSymbolizer`
   * `fill-opacity` is new.
   * `opacity` value now works to set the alpha of bitmap images.
- * `Expression` - you can now use the built in keyword of `[mapnik::geometry_type]` to filter features by geometry type either by name or integer key. The mapping is `0:no geometry`, `1:point`, '2:linestring`, `3:polygon`, and `4:collection`. A collection indicates that the `Feature` has more than one geometry of different types. So a `Feature` with three linestrings will be reported as `linestring` but a `Feature` with a point and a linestring will be reported as a `collection`. - for more details see [#546](https://github.com/mapnik/mapnik/issues/546)
+ * `Expression` - you can now use the built in keyword of `[mapnik::geometry_type]` to filter features by geometry type either by name or integer key. The mapping is `0:no geometry`, `1:point`, `2:linestring`, `3:polygon`, and `4:collection`. A collection indicates that the `Feature` has more than one geometry of different types. So a `Feature` with three linestrings will be reported as `linestring` but a `Feature` with a point and a linestring will be reported as a `collection`. - for more details see [#546](https://github.com/mapnik/mapnik/issues/546)
  * To All symbolizers (in most cases)
    * `comp-op` - All symbolizers now support compositing in the AGG and Cairo renderers
    * `clip` - All(most) symbolizers - boolean of whether to clip geometries before rendering (defaults to `true`)