diff --git a/videotape.lua b/videotape.lua
index 707231a..71007ea 100644
--- a/videotape.lua
+++ b/videotape.lua
@@ -9,7 +9,7 @@ local w, h = string.byte(tape.read(2), 1, 2)
 repeat
     for y = 1, h do
         mon.setCursorPos(1, y)
-        local buf = string.byte(tape.read(w), 1, -1)
+        local buf = { string.byte(tape.read(w), 1, -1) }
         local s, f, b = "", "", ""
         for x = 1, w do
             s = s .. string.char(0x80 + bit32.band(0x7F, buf[x]))