diff --git a/include/spdlog/sinks/dup_filter_sink.h b/include/spdlog/sinks/dup_filter_sink.h
index 14cabea2..ad208ffb 100644
--- a/include/spdlog/sinks/dup_filter_sink.h
+++ b/include/spdlog/sinks/dup_filter_sink.h
@@ -64,7 +64,7 @@ protected:
         if (skip_counter_ > 0)
         {
             memory_buf_t buf;
-            fmt::format_to(std::back_inserter(buf), fmt::runtime("Skipped {} duplicate messages.."), skip_counter_);
+            fmt::format_to(buf, "Skipped {} duplicate messages..", skip_counter_);
             details::log_msg skipped_msg{msg.logger_name, level::info, string_view_t{buf.data(), buf.size()}};
             dist_sink<Mutex>::sink_it_(skipped_msg);
         }