1 files changed, 3 insertions, 1 deletions
diff --git a/dom/base/nsContentUtils.h b/dom/base/nsContentUtils.h
index bf6a59dcd..64f7485cb 100644
--- a/dom/base/nsContentUtils.h
+++ b/dom/base/nsContentUtils.h
@@ -445,7 +445,9 @@ public:
     // Set if one or more error flags were set.
     eParseHTMLInteger_Error                 = 1 << 3,
     eParseHTMLInteger_ErrorNoValue          = 1 << 4,
-    eParseHTMLInteger_ErrorOverflow         = 1 << 5
+    eParseHTMLInteger_ErrorOverflow         = 1 << 5,
+    // Use this flag to detect the difference between overflow and underflow
+    eParseHTMLInteger_Negative              = 1 << 6,
   };
   static int32_t ParseHTMLInteger(const nsAString& aValue,
                                   ParseHTMLIntegerResultFlags *aResult);