1 files changed, 1 insertions, 1 deletions

diff --git a/bin/return-assignment b/bin/return-assignment
index b66244b..02bd491 100755
--- a/bin/return-assignment
+++ b/bin/return-assignment
@@ -196,7 +196,7 @@ if [ "$5" = 'ERROR' ]; then
         ' | \
         tr ' ' '\n' | \
         sed '
-          s/^/-p ^haskell-/
+          s/^/-p ^\\(haskell-\\)\\?/
           s/-[0-9.]\+$/\$/
         ' | \
         sort -u