diff --git a/client/plugins/init.client.js b/client/plugins/init.client.js
index 1f1aed59..86aae006 100644
--- a/client/plugins/init.client.js
+++ b/client/plugins/init.client.js
@@ -47,7 +47,7 @@ Vue.prototype.$sanitizeFilename = (filename, colonReplacement = ' - ') => {
   const windowsTrailingRe = /[\. ]+$/
   const lineBreaks = /[\n\r]/g
 
-  sanitized = filename
+  let sanitized = filename
     .replace(':', colonReplacement) // Replace first occurrence of a colon
     .replace(illegalRe, replacement)
     .replace(controlRe, replacement)
diff --git a/server/utils/fileUtils.js b/server/utils/fileUtils.js
index 2ce7e0d2..ad00d661 100644
--- a/server/utils/fileUtils.js
+++ b/server/utils/fileUtils.js
@@ -197,7 +197,7 @@ module.exports.sanitizeFilename = (filename, colonReplacement = ' - ') => {
   const windowsTrailingRe = /[\. ]+$/
   const lineBreaks = /[\n\r]/g
 
-  sanitized = filename
+  let sanitized = filename
     .replace(':', colonReplacement) // Replace first occurrence of a colon
     .replace(illegalRe, replacement)
     .replace(controlRe, replacement)