Japan’s antinuclear movement is still going strong, but when the news came out that Doraemon, everyone’s favorite robot cat, had lost his nuclear power source, fans were not impressed.

@FUKUBLOG, a sharp-eyed Twitter user, posted a photograph of the Big Doraemon Dictionary, in which the reference to a power source for Doraemon has been erased from the page. The original version shows that Doraemon is powered by his own nuclear reactor which, rather than plutonium or uranium, runs on anything he eats. Indeed, built with future technologies, Doraemon has so far been able to run around and fly in the sky without triggering an internal meltdown.

The reason for this omission is more than likely related to the meltdown at the Fukushima nuclear power plant. Doraemon fans, however, are not reacting well to this PC makeover. “So how on earth is Doraemon powered then?” tweeted one. “A non-nuclear Doraemon isn’t Doraemon,” wrote another.

When the story was reported in Byokan Sunday, 2chan users reactions included: “So what should we do after this change? He moves by solar-powered battery or something?” and “This kind of deletion is not necessary.”

Many others were worried about the future fate of Atom Boy and his rather unfortunately named younger sister Uran-chan (Uranium girl). Will they be switched to alternative energy sources?