diff --git a/generator/base/file.ts b/core/base/file.ts
similarity index 100%
rename from generator/base/file.ts
rename to core/base/file.ts
diff --git a/core/parser/parser.ts b/core/parser/parser.ts
index 41794c8..db3763a 100644
--- a/core/parser/parser.ts
+++ b/core/parser/parser.ts
@@ -14,8 +14,8 @@
  * limitations under the License.
  */
 
+import * as file from 'core/base/file';
 import * as types from 'core/types';
-import * as file from 'generator/base/file';
 import * as webidl from 'webidl2';
 
 async function readAndParse(idlFilePath: string): Promise<void> {
diff --git a/generator/main.ts b/generator/main.ts
index 97add8b..cb6e0cc 100644
--- a/generator/main.ts
+++ b/generator/main.ts
@@ -19,7 +19,7 @@ import * as mkdirp from 'mkdirp';
 import * as nunjucks from 'nunjucks';
 import * as path from 'path';
 
-import * as file from './base/file';
+import * as file from '../core/base/file';
 import DictionaryTypes from './parser/dictionary_types';
 import EnumTypes from './parser/enum_types';
 import IDLDefinition from './parser/idl_definition';
diff --git a/generator/reader/simple_reader.ts b/generator/reader/simple_reader.ts
index 9df6ca3..269b3b6 100644
--- a/generator/reader/simple_reader.ts
+++ b/generator/reader/simple_reader.ts
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-import * as file from '../base/file';
+import * as file from '../../core/base/file';
 
 export async function readAll(idl_files: string[]):
     Promise<[string, string][]> {