diff --git a/brmdoor_nfc.i b/brmdoor_nfc.i
index 98b8c4a..26cf9e4 100644
--- a/brmdoor_nfc.i
+++ b/brmdoor_nfc.i
@@ -7,6 +7,7 @@
 
 %include std_string.i
 %include std_except.i
+%include stdint.i
 
 %include "brmdoor_nfc.h"