Deadmau5 has said he's ready to defend his logo over Disney's apparent opposition to its use.
The Canadian DJ is known for wearing large headpieces with rounded ears.
He wrote on Twitter: "Landed home to some interesting news: looks like Disney officially just filed in opposition of my trademark... lawyer up Mickey."
He added: "Disney thinks you might confuse an established electronic musician/performer with a cartoon mouse."
In a statement to E! News, Deadmau5's attorney Dina LaPolt said: "The deadmau5 front-facing mau5head is a registered trademark in 30 countries worldwide.
"In June of last year, deadmau5 applied to register the front-facing mau5head with the US Patent and Trademark Office. Disney is now opposing the US filing."
She added: "Given that the mau5head and other identifying deadmau5 trademarks have been used in the US and around the world for almost a decade, we wonder why Disney is only now coming after deadmau5. Our client will not be bullied by Disney and is prepared to fight to protect his rights to his property."