diff --git a/build-constraints.yaml b/build-constraints.yaml
index 4988765e..25de4468 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -4688,7 +4688,7 @@ packages:
     "Jan Synacek <jan.synacek@scrive.com> @jsynacek":
         - hpqtypes
         
-    "Daan Leijen <daan@effp.org> @daanx:
+    "Daan Leijen <daan@effp.org> @daanx":
         - isocline
 
     "Grandfathered dependencies":