diff --git a/stepmania/src/LuaBinding.h b/stepmania/src/LuaBinding.h
index 61159f5fcf..8c7e3db635 100644
--- a/stepmania/src/LuaBinding.h
+++ b/stepmania/src/LuaBinding.h
@@ -14,7 +14,7 @@ extern "C"
 #define SArg(n) (luaL_checkstring(L,n))
 #define IArg(n) (luaL_checkint(L,n))
 #define BArg(n) (!!IArg(n))
-#define FArg(n) (luaL_checknumber(L,n))
+#define FArg(n) ((float) luaL_checknumber(L,n))
 
 
 #define LUA_REGISTER_CLASS( T ) \