1 files changed, 1 insertions, 1 deletions
diff --git a/src/dcp.cc b/src/dcp.cc
index c9d1c8e7..23b4ad48 100644
--- a/src/dcp.cc
+++ b/src/dcp.cc
@@ -269,7 +269,7 @@ DCP::read (vector<dcp::VerificationNote>* notes, bool ignore_incorrect_picture_m
 
 			bool found_threed_marked_as_twod = false;
 			auto asset = asset_factory(path, ignore_incorrect_picture_mxf_type, &found_threed_marked_as_twod);
-			if (asset->id() != id) {
+			if (asset->id() != id && notes) {
 				notes->push_back(dcp::VerificationNote{VerificationNote::Code::MISMATCHED_ASSET_MAP_ID}.set_asset_id(id).set_other_asset_id(asset->id()));
 			}
 			other_assets.push_back(asset);