diff --git a/libc/kernel/uapi/asm-arm/asm/unistd-eabi.h b/libc/kernel/uapi/asm-arm/asm/unistd-eabi.h
index 71b25e7..b9ea9bc 100644
--- a/libc/kernel/uapi/asm-arm/asm/unistd-eabi.h
+++ b/libc/kernel/uapi/asm-arm/asm/unistd-eabi.h
@@ -421,4 +421,5 @@
 #define __NR_process_mrelease (__NR_SYSCALL_BASE + 448)
 #define __NR_futex_waitv (__NR_SYSCALL_BASE + 449)
 #define __NR_set_mempolicy_home_node (__NR_SYSCALL_BASE + 450)
+#define __NR_cachestat (__NR_SYSCALL_BASE + 451)
 #endif
diff --git a/libc/kernel/uapi/asm-arm/asm/unistd-oabi.h b/libc/kernel/uapi/asm-arm/asm/unistd-oabi.h
index 08b3b9a..f7eb7ca 100644
--- a/libc/kernel/uapi/asm-arm/asm/unistd-oabi.h
+++ b/libc/kernel/uapi/asm-arm/asm/unistd-oabi.h
@@ -433,4 +433,5 @@
 #define __NR_process_mrelease (__NR_SYSCALL_BASE + 448)
 #define __NR_futex_waitv (__NR_SYSCALL_BASE + 449)
 #define __NR_set_mempolicy_home_node (__NR_SYSCALL_BASE + 450)
+#define __NR_cachestat (__NR_SYSCALL_BASE + 451)
 #endif