diff --git a/libc/upstream-netbsd/libc/gen/nice.c b/libc/upstream-netbsd/libc/gen/nice.c
new file mode 100644
index 0000000..19d6711
--- /dev/null
+++ b/libc/upstream-netbsd/libc/gen/nice.c
@@ -0,0 +1,70 @@
+/*	$NetBSD: nice.c,v 1.13 2011/05/01 02:49:54 christos Exp $	*/
+
+/*
+ * Copyright (c) 1983, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+#if defined(LIBC_SCCS) && !defined(lint)
+#if 0
+static char sccsid[] = "@(#)nice.c	8.1 (Berkeley) 6/4/93";
+#else
+__RCSID("$NetBSD: nice.c,v 1.13 2011/05/01 02:49:54 christos Exp $");
+#endif
+#endif /* LIBC_SCCS and not lint */
+
+#include "namespace.h"
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/resource.h>
+#include <errno.h>
+#include <unistd.h>
+
+#ifdef __weak_alias
+__weak_alias(nice,_nice)
+#endif
+
+/*
+ * Backwards compatible nice.
+ */
+int
+nice(int incr)
+{
+	int prio;
+
+	errno = 0;
+	prio = getpriority(PRIO_PROCESS, 0);
+	if (prio == -1 && errno)
+		return -1;
+	if (setpriority(PRIO_PROCESS, 0, prio + incr) == -1) {
+		if (errno == EACCES)
+			errno = EPERM;
+		return -1;
+	}
+	return getpriority(PRIO_PROCESS, 0);
+}
diff --git a/libc/upstream-netbsd/namespace.h b/libc/upstream-netbsd/namespace.h
new file mode 100644
index 0000000..a4d4151
--- /dev/null
+++ b/libc/upstream-netbsd/namespace.h
@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef _BIONIC_NETBSD_NAMESPACE_H_included
+#define _BIONIC_NETBSD_NAMESPACE_H_included
+
+// NetBSD uses __weak_alias on a lot of functions. We don't want that.
+#if defined(__weak_alias)
+#undef __weak_alias
+#endif
+
+#endif