The magnetic ordering of the ternary intermetallic compound U(Pd1-xFex)2Ge2 (x = 0.01, 0.02) was studied by µSR in the temperature range T = 15-300 K. The low temperature state changes from the modulated longitudinal spin density wave LSDW (x = 0.01) with a propagation vector k = [0 0 3/4] (TN = 140 K) to a simple antiferromagnetic structure AF (x = 0.02) with k = [0 0 1] (TN = 140 K). In the AF phase (sample with x = 0.02) the uranium magnetic moment shows a monotonic temperature dependence. In the LSDW phase with k = [0 0 3/4] (sample with x = 0.01) the magnetic moments of uranium atoms located in two magnetically nonequivalent positions (0 0 0) and (0 0 1) have different temperature dependences. One moment assumes a maximum at Tm1 = 50 K, while the other one does not display any peculiarities. The results are discussed within a model of the superposition of a square and sine modulation and are compared with neutron diffraction data. The observed peculiar temperature behaviour of the moments is connected with the temperature variation of the initial phase varphi of the LSDW modulation by Deltavarphi = 0.2 rad.