diff --git a/notes/2.13.md b/notes/2.13.md
index 8fdaf0a1d0..9de5f7626e 100644
--- a/notes/2.13.md
+++ b/notes/2.13.md
@@ -68,3 +68,7 @@ Corresponding issue/pull requests:
 # Different return type for OpenLayers.Format.WMSDescribeLayer
 
 The return type of WMSDescribeLayer format's `read` method was different from the one of the VersionedOGC format superclass. So it was changed from an array to an object with a layerDescriptions property that holds the array. For backwards compatibility, the object still has a length property and 0, ..., n properties with the previous array values.
+
+# Moved errorProperty from the base class to the parser
+
+This was necessary for WCS support because there are no properties in common between versions 1.0.0 and 1.1.0 that were appropriate for checking.  The only existing code that this affected was WFS parsing.