diff --git a/src/App.tsx b/src/App.tsx
index 8b679ce2..00927c2d 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -248,7 +248,7 @@ const AppNoError = ({
         <TreeReactFlow
           {...(selection && { selection })}
           onNodeClick={(_e, node) => {
-            if (!("nodeType" in node.data)) {
+            if (node.type == "primer-def-name") {
               setSelection({
                 def: node.data.def,
               });