diff --git a/os.c b/os.c
index 3f18cd4..187063d 100644
--- a/os.c
+++ b/os.c
@@ -7,13 +7,7 @@
 #include "s8slice.h"
 
 #include <stdio.h>
-
-enum {
-	OS_READ  = 1<<0,
-	OS_WRITE = 1<<1,
-	OS_ALLFLAGS = (1<<2)-1
-};
-typedef unsigned int os_open_flags;
+#include "os.h"
 
 S8Slice os_open_file(S8Slice path, os_open_flags flags)
 {