diff --git a/packages/ckeditor5-dev-build-tools/src/config.ts b/packages/ckeditor5-dev-build-tools/src/config.ts
index 36282b97e..b954b1526 100644
--- a/packages/ckeditor5-dev-build-tools/src/config.ts
+++ b/packages/ckeditor5-dev-build-tools/src/config.ts
@@ -313,7 +313,7 @@ function getTypeScriptPlugin( {
 		inlineSources: sourceMap, // https://github.com/rollup/plugins/issues/260
 		typescript: getUserDependency( 'typescript' ),
 		declaration: declarations,
-		declarationDir: declarations ? path.join( path.parse( output ).dir, 'types' ) : undefined,
+		declarationDir: declarations ? path.parse( output ).dir : undefined,
 		compilerOptions: {
 			emitDeclarationOnly: true
 		}
diff --git a/packages/ckeditor5-dev-build-tools/tests/build/build.test.ts b/packages/ckeditor5-dev-build-tools/tests/build/build.test.ts
index 0c6a0ff1e..756fa016d 100644
--- a/packages/ckeditor5-dev-build-tools/tests/build/build.test.ts
+++ b/packages/ckeditor5-dev-build-tools/tests/build/build.test.ts
@@ -116,7 +116,7 @@ test( 'TypeScript declarations', async () => {
 		'index.css',
 		'index-editor.css',
 		'index-content.css',
-		'types/input.d.ts'
+		'input.d.ts'
 	] );
 } );