diff --git a/layouts/partials/graph.html b/layouts/partials/graph.html
index a9637431e..7dcd5365d 100644
--- a/layouts/partials/graph.html
+++ b/layouts/partials/graph.html
@@ -185,7 +185,7 @@
   const labels = graphNode.append("text")
     .attr("dx", 12)
     .attr("dy", ".35em")
-    .text((d) => content[d.id.replace("%20", "-")].title)
+    .text((d) => content[d.id.replace("%20", "-")]?.title || "Untitled")
     .style("opacity", 0)
     .style("pointer-events", "none")
     .call(drag(simulation));