diff --git a/DuetPkg/PcRtc/x64RealTimeClock.dxs b/DuetPkg/PcRtc/X64RealTimeClock.dxs
similarity index 100%
rename from DuetPkg/PcRtc/x64RealTimeClock.dxs
rename to DuetPkg/PcRtc/X64RealTimeClock.dxs