One-punch killer Kieran Loveridge has been charged after a fight in Silverwater prison.
Loveridge, 24, is accused of approaching another inmate and punching him in the face at 2.20pm on February 26.
It is understood that Loveridge and a 34-year-old man were wrestling before being separated by Corrective Services officers.
The other man was taken to the clinic for treatment for facial injuries sustained.
Loveridge will appear in Burwood Local Court today.
He is currently serving 10 years for the manslaughter of Thomas Kelly after a one-punch attack at Kings Cross in 2012.