diff --git a/lib/dns/rdata/generic/caa_257.c b/lib/dns/rdata/generic/caa_257.c
index 648f4afdc3..8b54ec55fd 100644
--- a/lib/dns/rdata/generic/caa_257.c
+++ b/lib/dns/rdata/generic/caa_257.c
@@ -58,7 +58,7 @@ fromtext_caa(ARGS_FROMTEXT) {
 				      ISC_FALSE));
 	if (token.value.as_ulong > 255U)
 		RETTOK(ISC_R_RANGE);
-	flags = token.value.as_ulong;
+	flags = token.value.as_ulong & 255U;
 	RETERR(uint8_tobuffer(flags, target));
 
 	/*
diff --git a/lib/isc/win32/socket.c b/lib/isc/win32/socket.c
index 7050c65fd5..de12221c58 100644
--- a/lib/isc/win32/socket.c
+++ b/lib/isc/win32/socket.c
@@ -1343,7 +1343,6 @@ static int
 completeio_send(isc_socket_t *sock, isc_socketevent_t *dev,
 		struct msghdr *messagehdr, int cc, int send_errno)
 {
-	char addrbuf[ISC_SOCKADDR_FORMATSIZE];
 	char strbuf[ISC_STRERRORSIZE];
 
 	if (send_errno != 0) {