diff --git a/app/switch/resources/scripts/resources/functions/copy.lua b/app/switch/resources/scripts/resources/functions/copy.lua
index daf56c3f5..0d47bcd7e 100644
--- a/app/switch/resources/scripts/resources/functions/copy.lua
+++ b/app/switch/resources/scripts/resources/functions/copy.lua
@@ -1,8 +1,9 @@
 --add the copy function
 	function copy(src,dst)
 		--retrieve allowed characters and then use it to sanitize the dir variable
-		local allowed_chars = os.getenv("ALLOWED_CHARS") or "^%a%d%-%._~/"
-		dir = dir:gsub("[^" .. allowed_chars .. "]", "")
+		local allowed_chars = os.getenv("ALLOWED_CHARS") or "^%a%d%-%._~/";
+		src = src:gsub("[^" .. allowed_chars .. "]", "");
+		dst = dst:gsub("[^" .. allowed_chars .. "]", "");
 
 		if (package.config:sub(1,1) == "/") then
 			--unix
@@ -15,4 +16,4 @@
 		end
 		os.execute(cmd);
 		return cmd;
-	end
\ No newline at end of file
+	end