Dublin city's walls are covered in street art and graffiti, from gorgeous creations á la Joe Caslin's Equality mural, to words and slogans we'd really rather not see scrawled in white paint on our commute home.

One such negative piece of graffiti is drawing attention today, but it's for a pretty lovely reason.

Syrian-Irish Psychology student Tamim Mobayed posted the images to his Twitter account this morning, after seeing them "on a friend's Facebook page," and they've been getting quite a reaction online.

Love it-lightheartedly illuminating darkness in Dublin."Sound" is an Irish colloquialism used for "good" #muslims pic.twitter.com/1ZN3PYGhnQ

— Tamim Mobayed (@tammob88) March 24, 2016

"Love it – lightheartedly illuminating darkness in Dublin," Tamim wrote alongside the before-and-after images, the second of which shows the words "All Muslims are scum" altered to say "All Muslims are sound."

The photos have gotten quite a reaction online, with Dubliners praising the anonymous graffiti-fixer for altering the offensive slogan:

Anti Muslim graffiti went up in Dublin this week – quickly amended pic.twitter.com/5cCcXMPl1c

— Brian Whelan (@brianwhelanhack) March 25, 2016

This is the way to do it. Intolerance has no place in this city. https://t.co/1V9PmSf3MJ

— Noel Rock (@NoelRock) March 25, 2016

It's not a perfect solution to Ireland's ongoing racism problems of course, but we love the message behind it.