diff --git a/layout/html/style/src/nsCSSProps2.cpp b/layout/html/style/src/nsCSSProps2.cpp
index 48ff75e666d9..3e3ac9b265f0 100644
--- a/layout/html/style/src/nsCSSProps2.cpp
+++ b/layout/html/style/src/nsCSSProps2.cpp
@@ -785,8 +785,10 @@ const PRInt32 nsCSSProps::kHintTable[PROP_MAX] = {
   NS_STYLE_HINT_VISUAL, // PROP_BORDER_TOP_STYLE 
   NS_STYLE_HINT_REFLOW, // PROP_BORDER_TOP_WIDTH 
   NS_STYLE_HINT_REFLOW, // PROP_BORDER_WIDTH 
-  // PROP_BORDER_X_SPACING
-  // PROP_BORDER_Y_SPACING
+
+  NS_STYLE_HINT_REFLOW, // PROP_BORDER_X_SPACING XXX
+  NS_STYLE_HINT_REFLOW, // PROP_BORDER_Y_SPACING XXX
+
   NS_STYLE_HINT_REFLOW, // PROP_BOTTOM
   NS_STYLE_HINT_REFLOW, // PROP_CAPTION_SIDE
   NS_STYLE_HINT_REFLOW, // PROP_CLEAR