diff --git a/bedtools.wdl b/bedtools.wdl
index 6ae3b3c776a52c40dc3e16bb62e4c759fc711e16..4f39e2a8907b3b8a713373a562e466905f727587 100644
--- a/bedtools.wdl
+++ b/bedtools.wdl
@@ -182,7 +182,7 @@ task Intersect {
         bedtools intersect \
         -a ~{regionsA} \
         -b ~{regionsB} \
-        ~{true="--sorted" false="" sorted} \
+        ~{true="-sorted" false="" sorted} \
         ~{true="-g sorted.genome" false="" sorted} \
         > ~{outputBed}
     }