diff --git a/htmlparser/src/MANIFEST b/htmlparser/src/MANIFEST
index c327b9697e8..36bdb6b0e0b 100644
--- a/htmlparser/src/MANIFEST
+++ b/htmlparser/src/MANIFEST
@@ -23,3 +23,4 @@ nsHTMLEntities.h
 nsWellFormedDTD.h
 nsExpatDTD.h
 nsIExpatTokenizer.h
+nsParserError.h
diff --git a/parser/htmlparser/src/MANIFEST b/parser/htmlparser/src/MANIFEST
index c327b9697e8..36bdb6b0e0b 100644
--- a/parser/htmlparser/src/MANIFEST
+++ b/parser/htmlparser/src/MANIFEST
@@ -23,3 +23,4 @@ nsHTMLEntities.h
 nsWellFormedDTD.h
 nsExpatDTD.h
 nsIExpatTokenizer.h
+nsParserError.h