diff --git a/libc/arch-arm/syscalls/sendfile64.S b/libc/arch-arm/syscalls/sendfile64.S
new file mode 100644
index 0000000..87de344
--- /dev/null
+++ b/libc/arch-arm/syscalls/sendfile64.S
@@ -0,0 +1,15 @@
+/* autogenerated by gensyscalls.py */
+#include <asm/unistd.h>
+#include <linux/err.h>
+#include <machine/asm.h>
+
+ENTRY(sendfile64)
+    mov     ip, r7
+    ldr     r7, =__NR_sendfile64
+    swi     #0
+    mov     r7, ip
+    cmn     r0, #(MAX_ERRNO + 1)
+    bxls    lr
+    neg     r0, r0
+    b       __set_errno
+END(sendfile64)