diff --git a/common/hooks/post-pkg/01-xdelta_repolist.sh b/common/hooks/post-pkg/01-xdelta_repolist.sh
index a18f6ae3071..d5f2099b3f6 100644
--- a/common/hooks/post-pkg/01-xdelta_repolist.sh
+++ b/common/hooks/post-pkg/01-xdelta_repolist.sh
@@ -19,6 +19,11 @@ hook() {
 				done
 			fi
 
+			# generate an empty diff to the new file
+			newchk=`sha256sum ${newfile} | awk '{ print $1 }'`
+			xdelta3 -D -R -f -e -s "${newfile}" "${newfile}" \
+				"${newfile}.${newchk}.vcdiff"
+
 			rm -- "${oldfile}"
 		done
 }