diff --git a/lib/isc/unix/include/isc/net.h.in b/lib/isc/unix/include/isc/net.h.in
index f5fff21105..506eea1184 100644
--- a/lib/isc/unix/include/isc/net.h.in
+++ b/lib/isc/unix/include/isc/net.h.in
@@ -119,8 +119,8 @@ isc_net_haveipv6(void);
  *
  * Returns:
  *
- *	ISC_R_SUCCESS		IPv4 is supported.
- *	ISC_R_NOTFOUND		IPv4 is not supported.
+ *	ISC_R_SUCCESS		IPv6 is supported.
+ *	ISC_R_NOTFOUND		IPv6 is not supported.
  *	ISC_R_UNEXPECTED
  */