diff --git a/sys/kern/uipc_syscalls.c b/sys/kern/uipc_syscalls.c
index dfba61bc5daa..23700ca2d3db 100644
--- a/sys/kern/uipc_syscalls.c
+++ b/sys/kern/uipc_syscalls.c
@@ -498,7 +498,7 @@ sys_sendto(struct lwp *l, const struct sys_sendto_args *uap,
 		syscallarg(const struct sockaddr *)	to;
 		syscallarg(unsigned int)		tolen;
 	} */
-	struct msghdr	msg;
+	struct msghdr	msg = {0};
 	struct iovec	aiov;
 
 	msg.msg_name = __UNCONST(SCARG(uap, to)); /* XXXUNCONST kills const */
@@ -694,7 +694,7 @@ sys_recvfrom(struct lwp *l, const struct sys_recvfrom_args *uap,
 		syscallarg(struct sockaddr *)	from;
 		syscallarg(unsigned int *)	fromlenaddr;
 	} */
-	struct msghdr	msg;
+	struct msghdr	msg = {0};
 	struct iovec	aiov;
 	int		error;
 	struct mbuf	*from;