diff --git a/src/userprog/syscall.h b/src/userprog/syscall.h
new file mode 100644
index 0000000000000000000000000000000000000000..c349a90c059bbe38d34fb6ebf24b0646bfa530bb
--- /dev/null
+++ b/src/userprog/syscall.h
@@ -0,0 +1,8 @@
+#ifndef USERPROG_SYSCALL_H
+#define USERPROG_SYSCALL_H
+
+void syscall_init (void);
+
+void sys_exit (int);
+
+#endif