diff --git a/libc/kernel/uapi/asm-arm/asm/unistd-eabi.h b/libc/kernel/uapi/asm-arm/asm/unistd-eabi.h
index b9ea9bc..3490f5d 100644
--- a/libc/kernel/uapi/asm-arm/asm/unistd-eabi.h
+++ b/libc/kernel/uapi/asm-arm/asm/unistd-eabi.h
@@ -422,4 +422,5 @@
 #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)
+#define __NR_fchmodat2 (__NR_SYSCALL_BASE + 452)
 #endif
diff --git a/libc/kernel/uapi/asm-arm/asm/unistd-oabi.h b/libc/kernel/uapi/asm-arm/asm/unistd-oabi.h
index f7eb7ca..334ef0c 100644
--- a/libc/kernel/uapi/asm-arm/asm/unistd-oabi.h
+++ b/libc/kernel/uapi/asm-arm/asm/unistd-oabi.h
@@ -434,4 +434,5 @@
 #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)
+#define __NR_fchmodat2 (__NR_SYSCALL_BASE + 452)
 #endif