diff --git a/knots/parallelism.scm b/knots/parallelism.scm
index a3b04c7..c98ca3f 100644
--- a/knots/parallelism.scm
+++ b/knots/parallelism.scm
@@ -217,9 +217,9 @@
       (if (null? active-channels)
           (map
            (match-lambda
-             ((#f . ('exception  exn))
+             ((#f . ('exception exn))
               (raise-exception exn))
-             ((#f . ('result  val))
+             ((#f . ('result val))
               val))
            channels-to-results)
           (loop