diff --git a/TraceWinCondor/head.job.template b/TraceWinCondor/head.job.template
index 2a07bb21a42bf7a3e854b9eb66adb9fe401dd341..600ca31babd58ccb782c13782b4b06fc10200767 100644
--- a/TraceWinCondor/head.job.template
+++ b/TraceWinCondor/head.job.template
@@ -6,6 +6,8 @@ initialdir      = {args.calc_dir}/Local_TraceWin_$(Process)
 
 transfer_input_files = {input_files}
 
+requirements = ( OpSys == "LINUX" || OpSys == "OSX" )
+
 log            = condor.log
 
 executable     = TraceWin_exe/tracewin.$$(OpSys).$$(Arch)