How to use function declared in different JS file using jQuery getScript?

I have two JS files. One is called common.js and it use $.getScript to include other file with my js code. Part of including looks like this:

jQuery.getScript(js_path + "table.js", function(){
  generateTable(chartData, dataTypes);
});

This file (common.js) also contains function compare(a, b).

Now, the second one (table.js) has declared different function which uses the compare function from the first file. Something like this:

function someName() {
  var a = 2, 
      b = 5;
  var test = compare(a, b);
  return test;
}

When I run the code it gives me:

Uncaught ReferenceError: compare is not defined

How can I use function from the first file.