diff --git a/mozilla/htmlparser/src/nsIContentSink.h b/mozilla/htmlparser/src/nsIContentSink.h
index b76952cff56..24e9a54e390 100644
--- a/mozilla/htmlparser/src/nsIContentSink.h
+++ b/mozilla/htmlparser/src/nsIContentSink.h
@@ -49,6 +49,9 @@ class nsIParser;
 
 class nsIContentSink : public nsISupports {
 public:
+
+  NS_DEFINE_STATIC_IID_ACCESSOR(NS_ICONTENT_SINK_IID)
+
   /**
    * This method gets called when the parser begins the process
    * of building the content model via the content sink.
diff --git a/mozilla/parser/htmlparser/src/nsIContentSink.h b/mozilla/parser/htmlparser/src/nsIContentSink.h
index b76952cff56..24e9a54e390 100644
--- a/mozilla/parser/htmlparser/src/nsIContentSink.h
+++ b/mozilla/parser/htmlparser/src/nsIContentSink.h
@@ -49,6 +49,9 @@ class nsIParser;
 
 class nsIContentSink : public nsISupports {
 public:
+
+  NS_DEFINE_STATIC_IID_ACCESSOR(NS_ICONTENT_SINK_IID)
+
   /**
    * This method gets called when the parser begins the process
    * of building the content model via the content sink.