diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index e049f14..fc637be 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -605,6 +605,8 @@
 				    size_t len);
 asmlinkage long sys_getcpu(unsigned __user *cpu, unsigned __user *node, struct getcpu_cache __user *cache);
 asmlinkage long sys_signalfd(int ufd, sigset_t __user *user_mask, size_t sizemask);
+asmlinkage long sys_timerfd(int ufd, int clockid, int flags,
+			    const struct itimerspec __user *utmr);
 
 int kernel_execve(const char *filename, char *const argv[], char *const envp[]);