diff --git a/system/libraries/Zip.php b/system/libraries/Zip.php
index 6b59880..f7f47ab 100644
--- a/system/libraries/Zip.php
+++ b/system/libraries/Zip.php
@@ -301,7 +301,7 @@
 	 */	
 	function archive($filepath)
 	{
-		if (! ($fp = @fopen($filepath, FOPEN_WRITE_CREATE_BOF)))
+		if (! ($fp = @fopen($filepath, FOPEN_WRITE_CREATE_DESTRUCTIVE)))
 		{
 			return FALSE;
 		}