diff --git a/sys/compat/freebsd32/freebsd32_misc.c b/sys/compat/freebsd32/freebsd32_misc.c
--- a/sys/compat/freebsd32/freebsd32_misc.c
+++ b/sys/compat/freebsd32/freebsd32_misc.c
@@ -2195,7 +2195,7 @@
 	fdrop(fp, td);
 
 	if (uap->sbytes != NULL)
-		copyout(&sbytes, uap->sbytes, sizeof(off_t));
+		(void)copyout(&sbytes, uap->sbytes, sizeof(off_t));
 
 out:
 	if (hdr_uio)
diff --git a/sys/kern/kern_sendfile.c b/sys/kern/kern_sendfile.c
--- a/sys/kern/kern_sendfile.c
+++ b/sys/kern/kern_sendfile.c
@@ -1328,7 +1328,7 @@
 	fdrop(fp, td);
 
 	if (uap->sbytes != NULL)
-		copyout(&sbytes, uap->sbytes, sizeof(off_t));
+		(void)copyout(&sbytes, uap->sbytes, sizeof(off_t));
 
 out:
 	free(hdr_uio, M_IOV);