Complaining about your boss’ salary at the office probably isn’t a smart career move. But it could be the sort of “concerted activity” protected by the National Labor Relations Act, according to a decision from the U.S. Court of Appeals for the Third Circuit.

The unanimous Feb. 12 ruling, MCPc v. National Labor Relations Board, serves as a reminder that broad swaths of questionable employee conduct, from gossiping to cursing out superiors, can be protected workplace activity under the NLRA.