1 files changed, 1 insertions, 1 deletions
diff --git a/src/cpl.cc b/src/cpl.cc
index 86b738d9..f1f01b42 100644
--- a/src/cpl.cc
+++ b/src/cpl.cc
@@ -608,7 +608,7 @@ CPL::reel_file_assets () const
 
 
 bool
-CPL::equals (shared_ptr<const Asset> other, EqualityOptions opt, NoteHandler note) const
+CPL::equals(shared_ptr<const Asset> other, EqualityOptions const& opt, NoteHandler note) const
 {
 	auto other_cpl = dynamic_pointer_cast<const CPL>(other);
 	if (!other_cpl) {