Up-arrow does not complete the typed command in gdb, but instead iterates through all the history

I am having trouble with gdb. When I start pushing the Up Arrow key, it iterates backwards through the history. However, if I start typing a command, like b, instead of iterating only through history entries beginning with b, gdb still iterates backwards through all the history. The regular terminal (zsh) is fine. How do I make gdb iterate only through the history with the relevant commands?