diff --git a/lib/isc/include/isc/netaddr.h b/lib/isc/include/isc/netaddr.h
index 140d11826d..c73923bc8d 100644
--- a/lib/isc/include/isc/netaddr.h
+++ b/lib/isc/include/isc/netaddr.h
@@ -66,7 +66,7 @@ isc_result_t
 isc_netaddr_masktoprefixlen(const isc_netaddr_t *s, unsigned int *lenp);
 /*%<
  * Convert a netmask in 's' into a prefix length in '*lenp'.
- * The mask should consist of zero or more '1' bits in the most
+ * The mask should consist of zero or more '1' bits in the
  * most significant part of the address, followed by '0' bits.
  * If this is not the case, #ISC_R_MASKNONCONTIG is returned.
  *
diff --git a/lib/isc/netaddr.c b/lib/isc/netaddr.c
index 2178c7a2a7..10749af206 100644
--- a/lib/isc/netaddr.c
+++ b/lib/isc/netaddr.c
@@ -279,7 +279,6 @@ isc_netaddr_masktoprefixlen(const isc_netaddr_t *s, unsigned int *lenp) {
 	for (; i < ipbytes; i++) {
 		if (p[i] != 0)
 			return (ISC_R_MASKNONCONTIG);
-		i++;
 	}
 	*lenp = nbytes * 8 + nbits;
 	return (ISC_R_SUCCESS);