diff --git a/techniques/html/H73.html b/techniques/html/H73.html
index a5bddbddd8..7f8aeb9626 100644
--- a/techniques/html/H73.html
+++ b/techniques/html/H73.html
@@ -1,5 +1,5 @@
 ---
-obsoleteMessage: The <code class="att">summary</code> attribute is obsolete.
+obsoleteMessage: The <code class="att">summary</code> attribute is obsolete as of HTML5.
 obsoleteSince: 20
 ---
 <!DOCTYPE html><html lang="en" xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><head><title>Using the summary attribute of the table element to give an overview of data
