diff --git a/libc/kernel/common/linux/futex.h b/libc/kernel/common/linux/futex.h
new file mode 100644
index 0000000..30f9e59
--- /dev/null
+++ b/libc/kernel/common/linux/futex.h
@@ -0,0 +1,61 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   This header was automatically generated from a Linux kernel header
+ ***   of the same name, to make information necessary for userspace to
+ ***   call into the kernel available to libc.  It contains only constants,
+ ***   structures, and macros generated from the original header, and thus,
+ ***   contains no copyrightable information.
+ ***
+ ****************************************************************************
+ ****************************************************************************/
+#ifndef _LINUX_FUTEX_H
+#define _LINUX_FUTEX_H
+
+#include <linux/sched.h>
+
+#define FUTEX_WAIT 0
+#define FUTEX_WAKE 1
+#define FUTEX_FD 2
+#define FUTEX_REQUEUE 3
+#define FUTEX_CMP_REQUEUE 4
+#define FUTEX_WAKE_OP 5
+#define FUTEX_LOCK_PI 6
+#define FUTEX_UNLOCK_PI 7
+#define FUTEX_TRYLOCK_PI 8
+
+struct robust_list {
+ struct robust_list __user *next;
+};
+
+struct robust_list_head {
+
+ struct robust_list list;
+
+ long futex_offset;
+
+ struct robust_list __user *list_op_pending;
+};
+
+#define FUTEX_WAITERS 0x80000000
+
+#define FUTEX_OWNER_DIED 0x40000000
+
+#define FUTEX_TID_MASK 0x3fffffff
+
+#define ROBUST_LIST_LIMIT 2048
+
+#define FUTEX_OP_SET 0  
+#define FUTEX_OP_ADD 1  
+#define FUTEX_OP_OR 2  
+#define FUTEX_OP_ANDN 3  
+#define FUTEX_OP_XOR 4  
+#define FUTEX_OP_OPARG_SHIFT 8  
+#define FUTEX_OP_CMP_EQ 0  
+#define FUTEX_OP_CMP_NE 1  
+#define FUTEX_OP_CMP_LT 2  
+#define FUTEX_OP_CMP_LE 3  
+#define FUTEX_OP_CMP_GT 4  
+#define FUTEX_OP_CMP_GE 5  
+#define FUTEX_OP(op, oparg, cmp, cmparg)   (((op & 0xf) << 28) | ((cmp & 0xf) << 24)   | ((oparg & 0xfff) << 12) | (cmparg & 0xfff))
+#endif