diff --git a/src/client/component/party.cpp b/src/client/component/party.cpp
index bd5b4aae..276c28cb 100644
--- a/src/client/component/party.cpp
+++ b/src/client/component/party.cpp
@@ -1159,6 +1159,13 @@ namespace party
 				saved_info_response.host = target;
 				saved_info_response.info_string = info;
 
+				const auto protocl = info.get("protocol");
+				if (std::atoi(protocl.data()) != PROTOCOL)
+				{
+					menu_error("Connection failed: Invalid protocol.");
+					return;
+				}
+
 				if (info.get("challenge") != connect_state.challenge)
 				{
 					menu_error("Connection failed: Invalid challenge.");
diff --git a/src/client/component/server_list.cpp b/src/client/component/server_list.cpp
index ccf4fdfa..0d073289 100644
--- a/src/client/component/server_list.cpp
+++ b/src/client/component/server_list.cpp
@@ -316,6 +316,13 @@ namespace server_list
 
 	void handle_info_response(const game::netadr_s& address, const utils::info_string& info)
 	{
+		// Don't show servers that aren't using the same protocol!
+		const auto protocol = std::atoi(info.get("protocol").data());
+		if (protocol != PROTOCOL)
+		{
+			return;
+		}
+
 		// Don't show servers that aren't dedicated!
 		const auto dedicated = std::atoi(info.get("dedicated").data());
 		if (!dedicated)