Better lock your door.
3 seconds sound clip from the Island of Lost Souls (1932) movie soundboard.
You can hear this line at 00:56:06 in the Blu-ray version of the movie.
Quote context
[...]
- Oh, sure. Good night, Miss Thomas.
- Don't be frightened, dear. I'll be just across the hall.
- Oh, I'm all right. What's there to be afraid of?
- Now don't you worry. I'll be all right.
[...]