diff --git a/mozilla/htmlparser/src/MANIFEST b/mozilla/htmlparser/src/MANIFEST
index 7a90c13cb69..545c80f7a52 100644
--- a/mozilla/htmlparser/src/MANIFEST
+++ b/mozilla/htmlparser/src/MANIFEST
@@ -5,6 +5,7 @@
 nshtmlpars.h
 nsIContentSink.h
 nsIHTMLContentSink.h
+nsIHTMLFragmentContentSink.h
 nsHTMLContentSinkStream.h
 nsHTMLToTXTSinkStream.h
 nsITokenizer.h
diff --git a/mozilla/parser/htmlparser/src/MANIFEST b/mozilla/parser/htmlparser/src/MANIFEST
index 7a90c13cb69..545c80f7a52 100644
--- a/mozilla/parser/htmlparser/src/MANIFEST
+++ b/mozilla/parser/htmlparser/src/MANIFEST
@@ -5,6 +5,7 @@
 nshtmlpars.h
 nsIContentSink.h
 nsIHTMLContentSink.h
+nsIHTMLFragmentContentSink.h
 nsHTMLContentSinkStream.h
 nsHTMLToTXTSinkStream.h
 nsITokenizer.h