diff --git a/libc/kernel/uapi/linux/keyctl.h b/libc/kernel/uapi/linux/keyctl.h
index a988f49..0cc7f55 100644
--- a/libc/kernel/uapi/linux/keyctl.h
+++ b/libc/kernel/uapi/linux/keyctl.h
@@ -60,9 +60,16 @@
 #define KEYCTL_INVALIDATE 21
 #define KEYCTL_GET_PERSISTENT 22
 #define KEYCTL_DH_COMPUTE 23
+#define KEYCTL_RESTRICT_KEYRING 29
 struct keyctl_dh_params {
   __s32 __linux_private;
   __s32 prime;
   __s32 base;
 };
+struct keyctl_kdf_params {
+  char __user * hashname;
+  char __user * otherinfo;
+  __u32 otherinfolen;
+  __u32 __spare[8];
+};
 #endif