diff --git a/src/core/file_spec.js b/src/core/file_spec.js
index cf06d66a3..7db874d5b 100644
--- a/src/core/file_spec.js
+++ b/src/core/file_spec.js
@@ -66,8 +66,8 @@ class FileSpec {
   get filename() {
     if (!this._filename && this.root) {
       const filename = pickPlatformItem(this.root) || "unnamed";
-      this._filename = stringToPDFString(filename)
-        .replace(/\\\\/g, "\\") // lgtm [js/double-escaping]
+      this._filename = stringToPDFString(filename) // lgtm [js/double-escaping]
+        .replace(/\\\\/g, "\\")
         .replace(/\\\//g, "/")
         .replace(/\\/g, "/");
     }