diff --git a/frontend/util.lua b/frontend/util.lua
index 476895d58..7e22edddf 100644
--- a/frontend/util.lua
+++ b/frontend/util.lua
@@ -955,7 +955,7 @@ end
 ---- @treturn string sanitized filename
 local function replaceAllInvalidChars(str)
     if str then
-        return str:gsub('[\\%/:%*%?%"%<%>%|]', '_')
+        return str:gsub('[\\/:*?"<>|]', '_')
     end
 end