diff --git a/sys/include/net/gnrc/sixlowpan/frag/sfr.h b/sys/include/net/gnrc/sixlowpan/frag/sfr.h
index d958f4721c..b78c47c997 100644
--- a/sys/include/net/gnrc/sixlowpan/frag/sfr.h
+++ b/sys/include/net/gnrc/sixlowpan/frag/sfr.h
@@ -12,8 +12,9 @@
  * @brief       6LoWPAN selective fragment recovery implementation for GNRC
  *
  * 6LoWPAN selective fragment recovery is an alternative fragmentation
- * specification to [classic 6LoWPAN fragmentation](@ref
- * net_gnrc_sixlowpan_frag). It can be run in parallel to classic fragmentation,
+ * specification to
+ * [classic 6LoWPAN fragmentation](@ref net_gnrc_sixlowpan_frag).
+ * It can be run in parallel to classic fragmentation,
  * but is incompatible with its message formats.
  *
  * How nodes can exchange that they are able to communicate using selective