1 files changed, 10 insertions, 0 deletions

diff --git a/src/include/gnunet_signal_lib.h b/src/include/gnunet_signal_lib.h
index 5a14a2d9e..02fbbf005 100644
--- a/src/include/gnunet_signal_lib.h
+++ b/src/include/gnunet_signal_lib.h
@@ -18,7 +18,15 @@
      SPDX-License-Identifier: AGPL3.0-or-later
  */
 
+#if !defined (__GNUNET_UTIL_LIB_H_INSIDE__)
+#error "Only <gnunet_util_lib.h> can be included directly."
+#endif
+
 /**
+ * @addtogroup libgnunetutil
+ * Multi-function utilities library for GNUnet programs
+ * @{
+ *
  * @author Christian Grothoff
  *
  * @file
@@ -105,4 +113,6 @@ GNUNET_SIGNAL_raise (const int sig);
 
 /** @} */  /* end of group */
 
+/** @} */ /* end of group addition */
+
 /* end of gnunet_signal_lib.h */