diff --git a/CRM/Report/Form.php b/CRM/Report/Form.php
index 3bf7ac78448d98d0ccf9f3dabda944921ab693c0..3340712c4395db054404cba1425879c79959d749 100644
--- a/CRM/Report/Form.php
+++ b/CRM/Report/Form.php
@@ -279,14 +279,17 @@ class CRM_Report_Form extends CRM_Core_Form {
     // Get all custom groups
     $allGroups = CRM_Core_PseudoConstant::get('CRM_Core_DAO_CustomField', 'custom_group_id');
 
-    // Get the custom groupIds for which the user have VIEW permission
-    require_once 'CRM/ACL/API.php';
-    $permCustomGroupIds = CRM_ACL_API::group(CRM_Core_Permission::VIEW, NULL, 'civicrm_custom_group', $allGroups, NULL);
-
-    // do not allow custom data for reports if user don't have
-    // permission to access custom data.
-    if (!empty($this->_customGroupExtends) && !CRM_Core_Permission::check('access all custom data') && empty($permCustomGroupIds)) {
-      $this->_customGroupExtends = array();
+    // Get the custom groupIds for which the user has VIEW permission
+    // If the user has 'access all custom data' permission, we'll leave $permCustomGroupIds empty
+    // and addCustomDataToColumns() will allow access to all custom groups.
+    $permCustomGroupIds = array();
+    if (!CRM_Core_Permission::check('access all custom data')) {
+      $permCustomGroupIds = CRM_ACL_API::group(CRM_Core_Permission::VIEW, NULL, 'civicrm_custom_group', $allGroups, NULL);
+      // do not allow custom data for reports if user doesn't have
+      // permission to access custom data.
+      if (!empty($this->_customGroupExtends) && empty($permCustomGroupIds)) {
+        $this->_customGroupExtends = array();
+      }
     }
 
     // merge custom data columns to _columns list, if any