diff --git a/ports/win32/check/time.c b/ports/win32/check/time.c
index 15306fe..8a0e633 100644
--- a/ports/win32/check/time.c
+++ b/ports/win32/check/time.c
@@ -59,6 +59,6 @@ localtime_r(const time_t *timer, struct tm *result)
    if (local_result == NULL || result == NULL)
      return NULL;
 
-   memcpy(result, local_result, sizeof (result));
+   memcpy(result, local_result, sizeof(*result));
    return result;
 }