Regarding clearification on sec 54 F

we want to use the exemption u/s 54F .....so we are planning to pur a house prop....but there will also be another pur of house prop before the end of the FY.....assessee does not have any house prop before this....so will there be a contravention to the provisions of 54F if we pur 2 houses (0 houses earlier) within same yr