diff --git a/src/wireviz/wireviz.py b/src/wireviz/wireviz.py
index f8b2ef8..e147708 100755
--- a/src/wireviz/wireviz.py
+++ b/src/wireviz/wireviz.py
@@ -116,8 +116,11 @@ def parse(
     # keep track of auto-generated designators to avoid duplicates
     autogenerated_designators = {}
 
+    # When title is not given, either deduce it from filename, or use default text.
     if "title" not in harness.metadata:
-        harness.metadata["title"] = Path(yaml_file).stem if yaml_file else ""
+        harness.metadata["title"] = (
+            Path(yaml_file).stem if yaml_file else "WireViz diagram and BOM"
+        )
 
     # add items
     # parse YAML input file ====================================================