diff --git a/src/main/resources/assets/computercraft/lua/rom/programs/shell b/src/main/resources/assets/computercraft/lua/rom/programs/shell
index 5dda4cd3c..8b087d888 100644
--- a/src/main/resources/assets/computercraft/lua/rom/programs/shell
+++ b/src/main/resources/assets/computercraft/lua/rom/programs/shell
@@ -180,7 +180,7 @@ function shell.programs( _bIncludeHidden )
 	-- Sort and return
 	local tItemList = {}
 	for sItem, b in pairs( tItems ) do
-	    if sItem:find(".lua") == sItem:len()-3 then
+	    if sItem:sub(-4) == ".lua" then
 	        table.insert( tItemList, sItem:sub(1,-5) )
             else
 	        table.insert( tItemList, sItem )