diff --git a/src/lua/LuaScriptInterface.cpp b/src/lua/LuaScriptInterface.cpp
index a05aa0dd9d..74ea8fd1be 100644
--- a/src/lua/LuaScriptInterface.cpp
+++ b/src/lua/LuaScriptInterface.cpp
@@ -772,6 +772,7 @@ void LuaScriptInterface::initSimulationAPI()
 	SETCONST(l, TOOL_AIR);
 	SETCONST(l, TOOL_PGRV);
 	SETCONST(l, TOOL_NGRV);
+	SETCONST(l, TOOL_MIX);
 	lua_pushinteger(l, luacon_sim->tools.size()); lua_setfield(l, -2, "TOOL_WIND");
 	SETCONST(l, DECO_DRAW);
 	SETCONST(l, DECO_CLEAR);