LOS ANGELES — On Saturday night, the Academy of Motion Picture Arts and Sciences here will give Harry Belafonte an Oscar for his long fight against injustice, racial and otherwise, at its annual Governors Awards banquet. And one thing is sure: Mr. Belafonte, true to form, will speak his mind.

“I do think things have to be said,” Mr. Belafonte promised in an interview last month. He added, “There are lot of things it will be wonderful for the industry and my colleagues to hear.”

Wonderful, perhaps, in that Mr. Belafonte sees triumph in the best picture Oscar for “12 Years a Slave” this year. But not all of his words are likely to be sweet.

Mr. Belafonte, 87, makes clear that his deep gratitude for this Oscar, the Jean Hersholt Humanitarian Award, which honors his fight for social justice, is salted with the memory of wrongs that helped motivate his quest for industry changes that are only now arriving.