diff --git a/index.bs b/index.bs
index bbc814dc..7c141d82 100644
--- a/index.bs
+++ b/index.bs
@@ -5242,7 +5242,7 @@ The [=type name=] of the
 
 The {{DOMString}} type corresponds to
 the set of all possible sequences of [=code units=].
-Such sequences are commonly interpreted as UTF-16 encoded strings [[!RFC2781]]
+Such sequences are commonly interpreted as UTF-16 encoded strings [[RFC2781]]
 although this is not required.
 While {{DOMString}} is defined to be
 an OMG IDL boxed [=sequence type|sequence=]<{{unsigned short}}> valuetype