diff --git a/html/ops/size_census.php b/html/ops/size_census.php
index 42f73715db..f5939038fa 100755
--- a/html/ops/size_census.php
+++ b/html/ops/size_census.php
@@ -30,7 +30,7 @@ error_reporting(E_ALL);
 ini_set('display_errors', true);
 ini_set('display_startup_errors', true);
 
-require_once("../inc/boinc_db.inc");
+require_once("../inc/util.inc");
 
 function do_app($app) {
     // enumerate the host_app_versions for this app,
@@ -41,7 +41,7 @@ function do_app($app) {
         " from DBNAME.host_app_version, DBNAME.host, DBNAME.app_version " .
         " where host_app_version.app_version_id = app_version.id " .
         " and app_version.appid = $app->id " .
-        " and et_n > 0 " .
+        " and et_n > 0  and et_avg > 0 " .
         " and host.id = host_app_version.host_id";
     $result = $db->do_query($query);
     $a = array();
@@ -69,6 +69,8 @@ function do_app($app) {
     fclose($f);
 }
 
+echo "Starting: ", time_str(time()), "\n";
+
 if ($argc == 2 && $argv[1]=="--all_apps") {
     $apps = BoincApp::enum("deprecated=0");
 } else {
@@ -78,5 +80,6 @@ if ($argc == 2 && $argv[1]=="--all_apps") {
 foreach ($apps as $app) {
     do_app($app);
 }
+echo "Finished: ", time_str(time()), "\n";
 
 ?>