diff --git a/lib/graphql/client/errors.rb b/lib/graphql/client/errors.rb
index bd0c3f1..ec3e47a 100644
--- a/lib/graphql/client/errors.rb
+++ b/lib/graphql/client/errors.rb
@@ -21,7 +21,7 @@ def self.normalize_error_paths(data = nil, errors = [])
         errors.each do |error|
           path = ["data"]
           current = data
-          error.fetch("path", []).each do |key|
+          error["path"].to_a.each do |key|
             break unless current
             path << key
             current = current[key]
diff --git a/test/test_client_errors.rb b/test/test_client_errors.rb
index 84bfd0f..3937d48 100644
--- a/test/test_client_errors.rb
+++ b/test/test_client_errors.rb
@@ -164,6 +164,28 @@ def test_normalize_error_path
       ]
     }
     assert_equal expected, actual
+
+    actual = {
+      "data" => nil,
+      "errors" => [
+        {
+          "message" => "error",
+          "path" => nil
+        }
+      ]
+    }
+    GraphQL::Client::Errors.normalize_error_paths(actual["data"], actual["errors"])
+    expected = {
+      "data" => nil,
+      "errors" => [
+        {
+          "message" => "error",
+          "path" => nil,
+          "normalizedPath" => %w(data),
+        },
+      ],
+    }
+    assert_equal expected, actual
   end
 
   def test_filter_nested_errors_by_path