diff --git a/lib/graphql-hive/analyzer.rb b/lib/graphql-hive/analyzer.rb
index f0f5911..4b3911f 100644
--- a/lib/graphql-hive/analyzer.rb
+++ b/lib/graphql-hive/analyzer.rb
@@ -11,7 +11,7 @@ def initialize(query_or_multiplex)
 
       def on_enter_field(node, _parent, visitor)
         parent_type = visitor.parent_type_definition
-        if parent_type&.respond_to?(:graphql_name)
+        if parent_type&.respond_to?(:graphql_name) && node&.respond_to?(:name)
           @used_fields.add(parent_type.graphql_name)
           @used_fields.add(make_id(parent_type.graphql_name, node.name))
         end