diff --git a/kcc/comic2ebook.py b/kcc/comic2ebook.py
index 4ac8acb..fd822a2 100755
--- a/kcc/comic2ebook.py
+++ b/kcc/comic2ebook.py
@@ -212,6 +212,7 @@ def buildOPF(dstdir, title, filelist, cover=None):
"", title, "\n",
"en-US\n",
"", options.uuid, "\n",
+ "KCC\n",
"\n",
"\n",
"\n",