diff --git a/hmftools.wdl b/hmftools.wdl
index 5a480f93f60080593d1ab3829f74f226fbaff52c..628e2f9b00bc2f795d033c80bf5a9f73a4697600 100644
--- a/hmftools.wdl
+++ b/hmftools.wdl
@@ -190,7 +190,7 @@ task CupGenerateReport {
     command {
         set -e
         mkdir -p ./workdir ~{outputDir}
-        ln -s -t workdir ~{sep=" " cupData}
+        ln -s -t workdir ~{cupData}
         CupGenerateReport \
         ~{sampleName} \
         workdir/