Wheels are going inward on only 15s

I have 15 inch SI rims on my 95 Civic DX..I used to have the 13s. When I put them on and had them aligned, I noticed that they lean inward for some reason, I knew they did this if you lowered your car and had bigger rims but my car isnt lowered yet. They lean inward like / \. I was wondering what i need to do to fix this.. hopefully i dont need a camber kit.