diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index 8399728..f85472d 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -532,7 +532,9 @@
 			/* Decrease the count, but don't shutdown the
 			 * the service
 			 */
+			lock_kernel();
 			nfsd_serv->sv_nrthreads--;
+			unlock_kernel();
 		}
 		return err;
 	}