diff --git a/libc/kernel/uapi/linux/random.h b/libc/kernel/uapi/linux/random.h
index 3a5fbfd..2d3cfef 100644
--- a/libc/kernel/uapi/linux/random.h
+++ b/libc/kernel/uapi/linux/random.h
@@ -35,4 +35,5 @@
 };
 #define GRND_NONBLOCK 0x0001
 #define GRND_RANDOM 0x0002
+#define GRND_INSECURE 0x0004
 #endif