diff --git a/libc/include/bits/wait.h b/libc/include/bits/wait.h
new file mode 100644
index 0000000..a35f789
--- /dev/null
+++ b/libc/include/bits/wait.h
@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
+ * COPYRIGHT OWNER 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.
+ */
+
+#ifndef _BITS_WAIT_H_
+#define _BITS_WAIT_H_
+
+#include <sys/cdefs.h>
+
+#include <linux/wait.h>
+
+#define WEXITSTATUS(s) (((s) & 0xff00) >> 8)
+#define WCOREDUMP(s)   ((s) & 0x80)
+#define WTERMSIG(s)    ((s) & 0x7f)
+#define WSTOPSIG(s)    WEXITSTATUS(s)
+
+#define WIFEXITED(s)    (WTERMSIG(s) == 0)
+#define WIFSTOPPED(s)   (WTERMSIG(s) == 0x7f)
+#define WIFSIGNALED(s)  (WTERMSIG((s)+1) >= 2)
+#define WIFCONTINUED(s) ((s) == 0xffff)
+
+#define W_EXITCODE(ret, sig) ((ret) << 8 | (sig))
+#define W_STOPCODE(sig)      ((sig) << 8 | 0x7f)
+
+#endif