diff --git a/sys/include/net/ppp/hdr.h b/sys/include/net/ppp/hdr.h
index 0f1a84a96e..4e22e0c157 100644
--- a/sys/include/net/ppp/hdr.h
+++ b/sys/include/net/ppp/hdr.h
@@ -7,8 +7,8 @@
  */
 
 /**
- * @defgroup    net_ppp Header
- * @ingroup     net_ppp_hdr
+ * @defgroup    net_ppphdr Point-to-Point Protocol Header
+ * @ingroup     net_ppp
  * @brief       PPP header abstraction type and helper functions
  * @{
  *
diff --git a/sys/include/net/ppptype.h b/sys/include/net/ppptype.h
index 243de220b2..c2d14085a1 100644
--- a/sys/include/net/ppptype.h
+++ b/sys/include/net/ppptype.h
@@ -7,7 +7,7 @@
  */
 
 /**
- * @defgroup    net_ppptypes PPP types
+ * @defgroup    net_ppp Point-to-Point Protocol (PPP) Data Link Layer
  * @ingroup     net
  * @brief       PPP types