diff --git a/sim/main.lua b/sim/main.lua
index 8a96c8e..924177d 100644
--- a/sim/main.lua
+++ b/sim/main.lua
@@ -146,7 +146,7 @@ while 1 do
 			elseif data[i] == "GD" then
 				--print(table.concat(data, "\n", i, math.min(#data, i+100)))
 				local objref = tonumber(data[i+1])
-				local name = data[i+2]
+				local name = data[i+2] or ""
 				local desc = data[i+3]
 				local init = data[i+4]
 				local logic = data[i+5]
@@ -161,7 +161,7 @@ while 1 do
 						position = vectotable(data[a+1]),
 						direction = tonumber(data[a+2]),
 						causeupdate = toboolean(data[a+3]),
-						name = data[a+4],
+						name = data[a+4] or "",
 					}
 					ports[#ports+1] = port