diff --git a/lua/diagnostic/util.lua b/lua/diagnostic/util.lua
index 5904e42..a1c29b2 100644
--- a/lua/diagnostic/util.lua
+++ b/lua/diagnostic/util.lua
@@ -152,7 +152,7 @@ function M.locations_to_items(locations)
       if pos.character > #line then
         col = #line
       else
-        col = vim.str_byteindex(line, pos.character)
+        col = pos.character
       end
 
       table.insert(items, {