Luas validators have been fixed after it emerged some customers were wrongly being charged peak fares.
A number of the machines where passengers tag-on were found to be running two and a half minutes fast.
It means validating your journey at 6.58am would see you hit with the ticket price for travelling during rush hour.
Tech journalist Jess Kelly, who broke the story, says "it's not life-changing amounts of money but it's still money that looks better in your pocket!"
Transdev says the issue was fixed yesterday evenning, but it's blaming 'clock drift' for the inaccuracy:
"It is possible that PC clock drift can occur due to hardware or software faults or device restarts. This issue has been checked by our technicians and a fix will be implemented shortly."
