diff --git a/py/objint.c b/py/objint.c
index a771383..c190c18 100644
--- a/py/objint.c
+++ b/py/objint.c
@@ -38,6 +38,7 @@
 #include "smallint.h"
 #include "mpz.h"
 #include "objint.h"
+#include "objstr.h"
 #include "runtime0.h"
 #include "runtime.h"