diff --git a/resources/html.ditaval b/resources/html.ditaval
index d6c51135..834cc486 100644
--- a/resources/html.ditaval
+++ b/resources/html.ditaval
@@ -3,4 +3,5 @@
 <val>
   <prop action="include" att="deliveryTarget" val="html"/>
   <prop action="exclude" att="deliveryTarget" val="pdf"/>
+  <prop action="passthrough" att="importance"/>
 </val>
diff --git a/resources/site.ditaval b/resources/site.ditaval
index b620aa17..5a0db825 100644
--- a/resources/site.ditaval
+++ b/resources/site.ditaval
@@ -3,5 +3,6 @@
 <val>
   <prop action="include" att="deliveryTarget" val="html"/>
   <prop action="exclude" att="deliveryTarget" val="pdf"/>
+  <prop action="passthrough" att="importance"/>
   <prop action="passthrough" att="platform"/>
 </val>