diff --git a/build/gulpfile.editor.js b/build/gulpfile.editor.js
index 7f52fbff355..bc11c8b5034 100644
--- a/build/gulpfile.editor.js
+++ b/build/gulpfile.editor.js
@@ -197,7 +197,7 @@ const compileEditorESMTask = task.define('compile-editor-esm', () => {
 });
 
 function toExternalDTS(contents) {
-	let lines = contents.split('\n');
+	let lines = contents.split(/\r\n|\r|\n/);
 	let killNextCloseCurlyBrace = false;
 	for (let i = 0; i < lines.length; i++) {
 		let line = lines[i];