diff --git a/chat_messages.hpp b/chat_messages.hpp
index 88265b6..74db078 100644
--- a/chat_messages.hpp
+++ b/chat_messages.hpp
@@ -19,7 +19,7 @@ class chat_message
     std::string _content;
 
 public:
-    chat_message(message header, std::string content)
+    chat_message(message header, std::string content = "")
     :_header(header), _content(content) {}
 
     chat_message(std::underlying_type<message>::type header_integral, std::string content)