diff --git a/htmlparser/src/nsIParser.h b/htmlparser/src/nsIParser.h
index c3fc9e579cc6..b54b42749fb3 100644
--- a/htmlparser/src/nsIParser.h
+++ b/htmlparser/src/nsIParser.h
@@ -68,6 +68,7 @@ enum eCRCQuality {
 
 typedef enum {
    kCharsetUninitialized = 0,
+   kCharsetFromWeakDocTypeDefault,
    kCharsetFromUserDefault ,
    kCharsetFromDocTypeDefault,
    kCharsetFromParentFrame,
diff --git a/parser/htmlparser/src/nsIParser.h b/parser/htmlparser/src/nsIParser.h
index c3fc9e579cc6..b54b42749fb3 100644
--- a/parser/htmlparser/src/nsIParser.h
+++ b/parser/htmlparser/src/nsIParser.h
@@ -68,6 +68,7 @@ enum eCRCQuality {
 
 typedef enum {
    kCharsetUninitialized = 0,
+   kCharsetFromWeakDocTypeDefault,
    kCharsetFromUserDefault ,
    kCharsetFromDocTypeDefault,
    kCharsetFromParentFrame,