We have performed resistivity measurements as a function of applied pressure to 2.0 GPa on a single crystal of UCu2 Si2. We find that the ambient pressure magnetic ordering temperature of 100 K, and the low-temperature ordering at 50 K, both decrease gradually in a manner consistent with itinerant magnetism. The results will be compared to previous measurements on UCu2 Ge2. © 2007 Elsevier B.V. All rights reserved.