1 files changed, 3 insertions, 0 deletions
diff --git a/syscall.h b/syscall.h
index f054414..65d5ced 100644
--- a/syscall.h
+++ b/syscall.h
@@ -2,3 +2,6 @@
 #define SYS_exit 2
 #define SYS_wait 3
 #define SYS_cons_putc 4
+#define SYS_pipe 5
+#define SYS_write 6
+#define SYS_read 7