diff --git a/modules/drivers/fastty.lua b/modules/drivers/fastty.lua
index 1dc46d1..465d1e5 100644
--- a/modules/drivers/fastty.lua
+++ b/modules/drivers/fastty.lua
@@ -12,7 +12,9 @@ function tty(gA,sA,sI,mx,my)
 
   local function wl(s)
    s=tostring(s) or ""
-   for c in s:gmatch(".") do
+   for i = 1,unicode.len(s) do
+    local c = ""
+    c=unicode.sub(s,i,i)
     if c == "\f" then
      for i = 1, sy do
       sb[i] = nil
@@ -38,7 +40,7 @@ function tty(gA,sA,sI,mx,my)
      if sb[cy]:len() > sx then
       sb[cy] = sb[cy]:sub(1,sx)
      end
-     cx=cx+1
+     cx=cx+unicode.charWidth(c)
     end
    end
   end
@@ -67,6 +69,7 @@ function tty(gA,sA,sI,mx,my)
    if si == sI then
     wl(str)
     rd()
+    gpu.set(cx,cy,"█")
    end
   end
  end,{sI=sI})