Abstract: The present invention relates to a modifiable profile system (1) for constructing a wall, comprising two construction profiles (2, 3) which are displaceable telescopically with respect to each other and comprise a fixture (4) which is provided so as to be hingeable with respect to a first construction profile (2) of both construction profiles (2, 3) between an open position, in which both construction profiles (2, 3) are displaceable with respect to each other, and a closed position, in which this fixture (4) engages with the second construction profile (3) of both construction profiles (2, 3), so that both construction profiles (2, 3) are fixed with respect to each other.