diff --git a/src/Config.h b/src/Config.h
index 42f0c94ee..9c2b42a72 100644
--- a/src/Config.h
+++ b/src/Config.h
@@ -26,6 +26,13 @@
 #ifndef SNAPSHOT_ID
 #define SNAPSHOT_ID 0
 #endif
+
+// Mod ID, used on the http://starcatcher.us/TPT build server
+// The build server will compile for all platforms for you, and send updates in game
+// See jacob1 to get a mod ID
+#ifndef MOD_ID
+#define MOD_ID 0
+#endif
 //VersionInfoEnd
 
 //#define IGNORE_UPDATES //uncomment this for mods, to not get any update notifications
diff --git a/src/client/Client.cpp b/src/client/Client.cpp
index 67ccaf712..f1202ecad 100644
--- a/src/client/Client.cpp
+++ b/src/client/Client.cpp
@@ -824,15 +824,15 @@ bool Client::CheckUpdate(void *updateRequest, bool checkSession)
 						}
 					}
 
-#ifdef SNAPSHOT
+#if defined(SNAPSHOT) || MOD_ID > 0
 					Json::Value snapshotVersion = versions["Snapshot"];
 					int snapshotSnapshot = snapshotVersion["Snapshot"].asInt();
 					std::string snapshotFile = snapshotVersion["File"].asString();
 					std::string snapshotChangelog = snapshotVersion["Changelog"].asString();
-					if (snapshotSnapshot > SNAPSHOT_ID)
+					//if (snapshotSnapshot > SNAPSHOT_ID)
 					{
 						updateAvailable = true;
-						updateInfo = UpdateInfo(snapshotSnapshot, snapshotFile, snapshotChangelog, UpdateInfo::Snapshot);
+						updateInfo = UpdateInfo(2, snapshotFile, snapshotChangelog, UpdateInfo::Snapshot);
 					}
 #endif
 
diff --git a/src/client/GameSave.cpp b/src/client/GameSave.cpp
index eb81aaad2..2a09399fd 100644
--- a/src/client/GameSave.cpp
+++ b/src/client/GameSave.cpp
@@ -2174,6 +2174,7 @@ char * GameSave::serialiseOPS(unsigned int & dataLength)
 	bson_append_int(&b, "minorVersion", MINOR_VERSION);
 	bson_append_int(&b, "buildNum", BUILD_NUM);
 	bson_append_int(&b, "snapshotId", SNAPSHOT_ID);
+	bson_append_int(&b, "modId", MOD_ID);
 	bson_append_string(&b, "releaseType", IDENT_RELTYPE);
 	bson_append_string(&b, "platform", IDENT_PLATFORM);
 	bson_append_string(&b, "builtType", IDENT_BUILD);
diff --git a/src/client/HTTP.cpp b/src/client/HTTP.cpp
index 16a268a91..e9158f27a 100644
--- a/src/client/HTTP.cpp
+++ b/src/client/HTTP.cpp
@@ -194,7 +194,7 @@ void http_init(char *proxy)
 	}
 	std::stringstream userAgentBuilder;
 	userAgentBuilder << "PowderToy/" << SAVE_VERSION << "." << MINOR_VERSION << " ";
-	userAgentBuilder << "(" << IDENT_PLATFORM << "; " << IDENT_BUILD << "; M0) ";
+	userAgentBuilder << "(" << IDENT_PLATFORM << "; " << IDENT_BUILD << "; M" << MOD_ID << ") ";
 	userAgentBuilder << "TPTPP/" << SAVE_VERSION << "." << MINOR_VERSION << "." << BUILD_NUM << IDENT_RELTYPE << "." << SNAPSHOT_ID;
 	std::string newUserAgent = userAgentBuilder.str();
 	userAgent = new char[newUserAgent.length()+1];
diff --git a/src/gui/game/GameController.cpp b/src/gui/game/GameController.cpp
index e87bf2a4a..d017bf70c 100644
--- a/src/gui/game/GameController.cpp
+++ b/src/gui/game/GameController.cpp
@@ -1537,6 +1537,8 @@ void GameController::NotifyUpdateAvailable(Client * sender)
 
 #ifdef SNAPSHOT
 			updateMessage << "Snapshot " << SNAPSHOT_ID;
+#elif MOD_ID > 0
+			updateMessage << "Mod version " << SNAPSHOT_ID;
 #elif defined(BETA)
 			updateMessage << SAVE_VERSION << "." << MINOR_VERSION << " Beta, Build " << BUILD_NUM;
 #else
@@ -1547,7 +1549,11 @@ void GameController::NotifyUpdateAvailable(Client * sender)
 			if (info.Type == UpdateInfo::Beta)
 				updateMessage << info.Major << " " << info.Minor << " Beta, Build " << info.Build;
 			else if (info.Type == UpdateInfo::Snapshot)
+#if MOD_ID > 0
+				updateMessage << "Mod version " << info.Time;
+#else
 				updateMessage << "Snapshot " << info.Time;
+#endif
 			else if(info.Type == UpdateInfo::Stable)
 				updateMessage << info.Major << " " << info.Minor << " Stable, Build " << info.Build;
 
diff --git a/src/lua/LuaScriptInterface.cpp b/src/lua/LuaScriptInterface.cpp
index 105774aa5..4e7758ca4 100644
--- a/src/lua/LuaScriptInterface.cpp
+++ b/src/lua/LuaScriptInterface.cpp
@@ -239,12 +239,14 @@ LuaScriptInterface::LuaScriptInterface(GameController * c, GameModel * m):
 	lua_setfield(l, tptPropertiesVersion, "minor");
 	lua_pushinteger(l, BUILD_NUM);
 	lua_setfield(l, tptPropertiesVersion, "build");
-#ifdef SNAPSHOT
+#if defined(SNAPSHOT) || MOD_ID > 0
 	lua_pushinteger(l, SNAPSHOT_ID);
 #else
 	lua_pushinteger(l, 0);
 #endif
 	lua_setfield(l, tptPropertiesVersion, "snapshot");
+	lua_pushinteger(l, MOD_ID);
+	lua_setfield(l, tptPropertiesVersion, "modid");
 	lua_setfield(l, tptProperties, "version");
 
 	lua_sethook(l, &luacon_hook, LUA_MASKCOUNT, 200);