diff --git a/wp-admin/admin-footer.php b/wp-admin/admin-footer.php
index 698e37e61e..7c2bcd2940 100644
--- a/wp-admin/admin-footer.php
+++ b/wp-admin/admin-footer.php
@@ -27,8 +27,12 @@ do_action('admin_footer', '');
 do_action('admin_print_footer_scripts');
 do_action("admin_footer-$hook_suffix");
 
-if ( false === get_site_option('can_compress_scripts') )
-	compression_test();
+// get_site_option() won't exist when auto upgrading from <= 2.7
+if ( function_exists('get_site_option') ) {
+	if ( false === get_site_option('can_compress_scripts') )
+		compression_test();
+}
+
 ?>
 
 <script type="text/javascript">if(typeof wpOnload=='function')wpOnload();</script>