diff --git a/g2e.awk b/g2e.awk
index dc904a4..5b6d0f4 100644
--- a/g2e.awk
+++ b/g2e.awk
@@ -107,7 +107,9 @@ ARGIND==2 && FNR==1{
 		mediatype = dest~/gif$/ ? "image/gif" : dest~/jpg$/ ? "image/jpeg" : "image/png"
 		id = dest
 		sub(/^.+\//,"",id) # get basename
-		content = content "    <item id=\"" id "\" href=\"" dest "\" media-type=\"" mediatype "\"/>\n"
+
+		properties = id~/cover/ ? "properties=\"cover-image\"" : ""
+		content = content "    <item id=\"" id "\" href=\"" dest "\" media-type=\"" mediatype "\" " properties "/>\n"
 	}
 	$0 = line