diff --git a/arch/arm/syscall.def b/arch/arm/syscall.def
index d6ea21d98..b8b3b1a46 100644
--- a/arch/arm/syscall.def
+++ b/arch/arm/syscall.def
@@ -22,6 +22,7 @@ rt_sigprocmask	sigprocmask	135	175	(int how, k_rtsigset_t *set, k_rtsigset_t *ol
 rt_sigreturn			139	173	(void)
 ioctl				29	54	(unsigned int fd, unsigned int cmd, unsigned long arg)
 pread64				67	180	(unsigned int fd, char *buf, size_t count, loff_t pos)
+ptrace				117	26	(long request, pid_t pid, void *addr, void *data)
 mremap				216	163	(unsigned long addr, unsigned long old_len, unsigned long new_len, unsigned long flag, unsigned long new_addr)
 mincore				232	219	(void *addr, unsigned long size, unsigned char *vec)
 madvise				233	220	(unsigned long start, size_t len, int behavior)