diff --git a/src/__phutil_library_map__.php b/src/__phutil_library_map__.php
--- a/src/__phutil_library_map__.php
+++ b/src/__phutil_library_map__.php
@@ -4940,6 +4940,7 @@
     'PhabricatorUserIconField' => 'applications/people/customfield/PhabricatorUserIconField.php',
     'PhabricatorUserLog' => 'applications/people/storage/PhabricatorUserLog.php',
     'PhabricatorUserLogType' => 'applications/people/userlog/PhabricatorUserLogType.php',
+    'PhabricatorUserLogTypeDatasource' => 'applications/people/typeahead/PhabricatorUserLogTypeDatasource.php',
     'PhabricatorUserLogView' => 'applications/people/view/PhabricatorUserLogView.php',
     'PhabricatorUserMessageCountCacheType' => 'applications/people/cache/PhabricatorUserMessageCountCacheType.php',
     'PhabricatorUserNotificationCountCacheType' => 'applications/people/cache/PhabricatorUserNotificationCountCacheType.php',
@@ -11377,6 +11378,7 @@
       'PhabricatorPolicyInterface',
     ),
     'PhabricatorUserLogType' => 'Phobject',
+    'PhabricatorUserLogTypeDatasource' => 'PhabricatorTypeaheadDatasource',
     'PhabricatorUserLogView' => 'AphrontView',
     'PhabricatorUserMessageCountCacheType' => 'PhabricatorUserCacheType',
     'PhabricatorUserNotificationCountCacheType' => 'PhabricatorUserCacheType',
diff --git a/src/applications/people/query/PhabricatorPeopleLogSearchEngine.php b/src/applications/people/query/PhabricatorPeopleLogSearchEngine.php
--- a/src/applications/people/query/PhabricatorPeopleLogSearchEngine.php
+++ b/src/applications/people/query/PhabricatorPeopleLogSearchEngine.php
@@ -78,11 +78,11 @@
         ->setAliases(array('actors', 'actor', 'actorPHID'))
         ->setLabel(pht('Actors'))
         ->setDescription(pht('Search for activity by specific users.')),
-      id(new PhabricatorSearchCheckboxesField())
+      id(new PhabricatorSearchDatasourceField())
         ->setKey('actions')
         ->setLabel(pht('Actions'))
         ->setDescription(pht('Search for particular types of activity.'))
-        ->setOptions($types),
+        ->setDatasource(new PhabricatorUserLogTypeDatasource()),
       id(new PhabricatorSearchTextField())
         ->setKey('ip')
         ->setLabel(pht('Filter IP'))
diff --git a/src/applications/people/typeahead/PhabricatorUserLogTypeDatasource.php b/src/applications/people/typeahead/PhabricatorUserLogTypeDatasource.php
new file mode 100644
--- /dev/null
+++ b/src/applications/people/typeahead/PhabricatorUserLogTypeDatasource.php
@@ -0,0 +1,43 @@
+<?php
+
+final class PhabricatorUserLogTypeDatasource
+  extends PhabricatorTypeaheadDatasource {
+
+  public function getBrowseTitle() {
+    return pht('Browse Log Types');
+  }
+
+  public function getPlaceholderText() {
+    return pht('Type a log type name...');
+  }
+
+  public function getDatasourceApplicationClass() {
+    return 'PhabricatorPeopleApplication';
+  }
+
+  public function loadResults() {
+    $results = $this->buildResults();
+    return $this->filterResultsAgainstTokens($results);
+  }
+
+  protected function renderSpecialTokens(array $values) {
+    return $this->renderTokensFromResults($this->buildResults(), $values);
+  }
+
+  private function buildResults() {
+    $results = array();
+
+    $type_map = PhabricatorUserLogType::getAllLogTypes();
+    foreach ($type_map as $type_key => $type) {
+
+      $result = id(new PhabricatorTypeaheadResult())
+        ->setPHID($type_key)
+        ->setName($type->getLogTypeName());
+
+      $results[$type_key] = $result;
+    }
+
+    return $results;
+  }
+
+}