diff --git a/install_full/php5/airtime.ini b/install_full/php5/airtime.ini
index e35f600b0..829e5edd0 100644
--- a/install_full/php5/airtime.ini
+++ b/install_full/php5/airtime.ini
@@ -3,3 +3,6 @@ memory_limit = 512M
 magic_quotes_gpc = Off
 file_uploads = On
 upload_tmp_dir = /tmp
+apc.write_lock = 1
+apc.slam_defense = 0
+