1 files changed, 1 insertions, 1 deletions
diff --git a/py/modstruct.c b/py/modstruct.c
index 61da283da5..8d44006381 100644
--- a/py/modstruct.c
+++ b/py/modstruct.c
@@ -101,7 +101,7 @@ STATIC mp_obj_t struct_calcsize(mp_obj_t fmt_in) {
     char fmt_type = get_fmt_type(&fmt);
     mp_uint_t size;
     for (size = 0; *fmt; fmt++) {
-        uint align = 1;
+        mp_uint_t align = 1;
         mp_uint_t cnt = 1;
         if (unichar_isdigit(*fmt)) {
             cnt = get_fmt_num(&fmt);