diff --git a/include/spdlog/details/fmt_helper.h b/include/spdlog/details/fmt_helper.h
index 4c9ea14e..f728b176 100644
--- a/include/spdlog/details/fmt_helper.h
+++ b/include/spdlog/details/fmt_helper.h
@@ -115,7 +115,7 @@ inline void pad6(size_t n, fmt::memory_buffer &dest)
         dest.push_back('0');
         dest.push_back('0');
     }
-    else if (n >= 0)
+    else // 0-9
     {
         dest.push_back('0');
         dest.push_back('0');