diff --git a/exprtk_simple_example_16.cpp b/exprtk_simple_example_16.cpp
index 845c427..1b8ba44 100644
--- a/exprtk_simple_example_16.cpp
+++ b/exprtk_simple_example_16.cpp
@@ -54,13 +54,11 @@
    T rmse  = T(0);
 
    symbol_table_t symbol_table;
-
    symbol_table.add_variable("alpha",alpha);
    symbol_table.add_variable("beta" ,beta );
    symbol_table.add_variable("rmse" ,rmse );
-
-   symbol_table.add_vector("x",x);
-   symbol_table.add_vector("y",y);
+   symbol_table.add_vector  ("x"    ,x    );
+   symbol_table.add_vector  ("y"    ,y    );
 
    expression_t expression;
    expression.register_symbol_table(symbol_table);