diff --git a/src/App.tsx b/src/App.tsx
index 488a42f2..a735efaa 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -294,7 +294,7 @@ const AppNoError = ({
           {...defaultTreeReactFlowProps}
           {...(selection && { selection })}
           onNodeClick={(_e, node) => {
-            if (!("nodeType" in node.data)) {
+            if (node.type == "primer-def-name") {
               setSelection({
                 def: node.data.def,
               });