diff --git a/sys/netinet6/in6.c b/sys/netinet6/in6.c
index 2d6ce6884096..7d0e5dac56a6 100644
--- a/sys/netinet6/in6.c
+++ b/sys/netinet6/in6.c
@@ -966,7 +966,7 @@ in6_purgeaddr(ifa, ifp)
 
 /*
  * SIOC[GAD]LIFADDR.
- *	SIOCGLIFADDR: get first address. (???)
+ *	SIOCGLIFADDR: get first address. (?)
  *	SIOCGLIFADDR with IFLR_PREFIX:
  *		get first address that matches the specified prefix.
  *	SIOCALIFADDR: add the specified address.