diff --git a/cutadapt.wdl b/cutadapt.wdl
index 759713192c21e0fedd0416e80db17df4eafd9016..f3e8e29e167df6fba7156cd2f65d71f4adfc0c8b 100644
--- a/cutadapt.wdl
+++ b/cutadapt.wdl
@@ -70,6 +70,7 @@ task Cutadapt {
         then "mkdir -p $(dirname " + realRead2output + ")"
         else ""
 
+    # FIXME: Use prefix() function for adapter, adapterRead2, etc.
     command {
         set -e
         ~{"mkdir -p $(dirname " + read1output + ")"}