diff --git a/services/clsi/app/js/ConversionController.js b/services/clsi/app/js/ConversionController.js
index 3a0a27920d..745349f0f5 100644
--- a/services/clsi/app/js/ConversionController.js
+++ b/services/clsi/app/js/ConversionController.js
@@ -14,7 +14,6 @@ import RequestParser from './RequestParser.js'
 import { pipeline } from 'node:stream/promises'
 import Settings from '@overleaf/settings'
 import Path from 'node:path'
-import { ConversionError } from './Errors.js'
 
 const CONVERSION_CONFIGS = {
   docx: { extension: 'docx' },
@@ -42,7 +41,7 @@ async function convertDocumentToLaTeX(req, res) {
       conversionType
     )
   } catch (err) {
-    if (err instanceof ConversionError) {
+    if (err instanceof Errors.ConversionError) {
       if (err.isUserFacing) {
         return res.status(422).json({
           error: err.stderr,
@@ -178,7 +177,7 @@ async function convertProjectToDocument(req, res) {
       await pipeline(readStream, res)
     }
   } catch (err) {
-    if (err instanceof ConversionError) {
+    if (err instanceof Errors.ConversionError) {
       if (err.isUserFacing) {
         return res.status(422).json({
           error: err.stderr,