diff --git a/packages/graphqlsp/src/ast/checks.ts b/packages/graphqlsp/src/ast/checks.ts
index 2f4735d..a22fce2 100644
--- a/packages/graphqlsp/src/ast/checks.ts
+++ b/packages/graphqlsp/src/ast/checks.ts
@@ -98,6 +98,8 @@ export const getSchemaName = (
 ): string | null => {
   if (!typeChecker) return null;
   const type = typeChecker.getTypeAtLocation(
+    // When calling `graphql.persisted`, we need to access the `graphql` part of
+    // the expression; `node.expression` is the `.persisted` part
     isTadaPersistedCall ? node.getChildAt(0).getChildAt(0) : node.expression
   );
   if (type) {