diff --git a/sys/kern/vfs_syscalls.c b/sys/kern/vfs_syscalls.c
index fbec149ca52..13a0ed1cee2 100644
--- a/sys/kern/vfs_syscalls.c
+++ b/sys/kern/vfs_syscalls.c
@@ -643,6 +643,8 @@ freebsd4_getfsstat(td, uap)
 	size = count * sizeof(struct statfs);
 	error = kern_getfsstat(td, &buf, size, &count, UIO_SYSSPACE,
 	    uap->mode);
+	if (buf == NULL)
+		return (EINVAL);
 	td->td_retval[0] = count;
 	if (size != 0) {
 		sp = buf;