A single tweet appeared to prompt a prominent Canadian museum to change its stance on the country’s historic treatment of indigenous people.

The shift from the Canadian Museum for Human Rights in Winnipeg — which now says the country’s treatment of its indigenous population was genocide — came after a visitor asked about the subject on Twitter, reports national broadcaster CBC.

“I think for many years we didn’t think it was the role of a museum to declare this to be a genocide,” museum spokeswoman Louise Waldman said. “And I think now what’s happened is we understand it’s not just our role, but our responsibility and our commitment as a national institution that’s dedicated to human rights education.”

The visitor tweeted at the museum earlier this month, asking why “the CMHR never formally recognized the struggle of indigenous peoples as a genocide.”

The museum previously showed an exhibit stating, “From the 1880s to the 1990s, thousands of Indigenous children were torn from their homes and sent to… schools… intended to destroy Indigenous families, communities and ways of life.

“Since the 1980s, survivors have courageously and publicly shared their experiences. This eventually led to formal apologies, a class action lawsuit, and the establishment of the Truth and Reconciliation Commission of Canada.”