Because others might not be up with the terminology: in a Go struct an "embedded field" or "anonymous field" is a member of a struct that you didn't give a name

Because others might not be up with the terminology: in a Go struct an "embedded field" or "anonymous field" is a member of a struct that you didn't give a name to. type MyType struct { sync.Mutex // embedded/anonymous mu sync.Mutex // not embedded } So AYBABTME's advice is to give the mutex a name.