diff --git a/src/libcharon/daemon.h b/src/libcharon/daemon.h
index a75237881..3d74038e7 100644
--- a/src/libcharon/daemon.h
+++ b/src/libcharon/daemon.h
@@ -64,6 +64,9 @@
  * @defgroup tasks tasks
  * @ingroup sa
  *
+ * @defgroup tnc tnc
+ * @ingroup libcharon
+ *
  * @addtogroup libcharon
  * @{
  *