diff --git a/src/BufferedMsg.cpp b/src/BufferedMsg.cpp
index 4dbc2895..8ee8439a 100644
--- a/src/BufferedMsg.cpp
+++ b/src/BufferedMsg.cpp
@@ -36,7 +36,7 @@ namespace fabomatic
       }
       has_changed = true;
 
-      ESP_LOGI(TAG, "Buffered %s on %s, %lu messages queued", message.c_str(), topic.c_str(), msg_queue.size());
+      ESP_LOGI(TAG, "Buffered %s on %s, %u messages queued", message.c_str(), topic.c_str(), msg_queue.size());
     }
   }