forgot to build for amd64 again...
diff --git a/aos/common/util/log_interval.h b/aos/common/util/log_interval.h
index 9acbe40..188a16c 100644
--- a/aos/common/util/log_interval.h
+++ b/aos/common/util/log_interval.h
@@ -68,8 +68,8 @@
     interval_.WantToLog();
     if (interval_.ShouldLog()) {
       log_do(level_, "%s: %.*s %d times over %f sec\n", context,
-             message_.size(), message_.data(), interval_.Count(),
-             interval_.interval().ToSeconds());
+             static_cast<int>(message_.size()), message_.data(),
+             interval_.Count(), interval_.interval().ToSeconds());
     }
   }