Hawley scored Town's winning goal against Hartlepool on Friday night and the boss wants to keep his man a bit longer.
"Karl wants to stay here and I am certain he will be available for us for the game against Yeovil (on Saturday).
"I'm just waiting on a decision from Preston and I need to speak to Alan Irvine and get a confirmation on that. Karl took his goal very well last night and I'm keen to get him on board for another month."
In the six games played for Northampton Karl Hawley has scored twice.