diff --git a/spec/ttml2.xml b/spec/ttml2.xml
index c6ff0cd06..8b1c65a8c 100644
--- a/spec/ttml2.xml
+++ b/spec/ttml2.xml
@@ -1109,7 +1109,7 @@ glyph metrics, and other data used in the character to glyph mapping and renderi
A syntactic subset of a
A <supports-function> value expression evaluates to true
if the specified feature or extension
designator is (semantically) supported by the
A <uri> value expression is used to specify a URI
For avoidance of doubt, characters designated to be excluded in a URI by <uri>
value.
For avoidance of doubt, characters designated to be excluded in a URI by <uri>
value.