diff --git a/addons/libs/dialog.lua b/addons/libs/dialog.lua
index 6f2e16d59..02423389c 100644
--- a/addons/libs/dialog.lua
+++ b/addons/libs/dialog.lua
@@ -214,8 +214,8 @@ function dialog.open_dat_by_zone_id(zone_id, language)
     end
 
     local dat_path = windower.ffxi_path
-    if not dat_path:endswith('\\') then
-        dat_path = dat_path..'\\'
+    if sub(dat_path, -1, -1) ~= '\\' then
+        dat_path = dat_path .. '\\'
     end
     local path
     local vtable = dat_path .. 'VTABLE.DAT'