Van Persie has struck 17 goals so far this season.
Walcott said: "The only side of things that I want to get in my game is a few more goals. We can't always rely on Robin but the form he has been in it is fantastic to see.
"People will think it is weird when he doesn't score in a game but he creates chances still. It would be worrying if you didn't see Robin creating chances, but he is and the man is on fire which makes my job easier.
"But as a team we need to help him out a bit more often in getting those goals."