diff --git a/include/crm/common/scheduler_types.h b/include/crm/common/scheduler_types.h
index 42bfb1fd89..5c4a193039 100644
--- a/include/crm/common/scheduler_types.h
+++ b/include/crm/common/scheduler_types.h
@@ -1,36 +1,39 @@
 /*
  * Copyright 2023 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
  * This source code is licensed under the GNU Lesser General Public License
  * version 2.1 or later (LGPLv2.1+) WITHOUT ANY WARRANTY.
  */
 
 #ifndef PCMK__CRM_COMMON_SCHEDULER_TYPES__H
 #  define PCMK__CRM_COMMON_SCHEDULER_TYPES__H
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
 /*!
  * \file
  * \brief Type aliases needed to define scheduler objects
  * \ingroup core
  */
 
 //! Node object (including information that may vary depending on resource)
 typedef struct pe_node_s pcmk_node_t;
 
 //! Resource object
 typedef struct pe_resource_s pcmk_resource_t;
 
 //! Action object
 typedef struct pe_action_s pcmk_action_t;
 
+//! Scheduler object
+typedef struct pe_working_set_s pcmk_scheduler_t;
+
 #ifdef __cplusplus
 }
 #endif
 
 #endif // PCMK__CRM_COMMON_SCHEDULER_TYPES__H