diff --git a/include/crm/common/util_compat.h b/include/crm/common/util_compat.h
index 2696c89e72..766b3a126d 100644
--- a/include/crm/common/util_compat.h
+++ b/include/crm/common/util_compat.h
@@ -1,52 +1,45 @@
 /*
  * Copyright 2004-2024 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_UTIL_COMPAT__H
 #define PCMK__CRM_COMMON_UTIL_COMPAT__H
 
 #include <glib.h>
 #include <libxml/tree.h>
 #include <crm/common/util.h>
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
 /**
  * \file
  * \brief Deprecated Pacemaker utilities
  * \ingroup core
  * \deprecated Do not include this header directly. The utilities in this
  *             header, and the header itself, will be removed in a future
  *             release.
  */
 
 //! \deprecated Do not use
 #define CRM_DEFAULT_OP_TIMEOUT_S "20s"
 
-//! \deprecated Use !pcmk_is_set() or !pcmk_all_flags_set() instead
-static inline gboolean
-is_not_set(long long word, long long bit)
-{
-    return ((word & bit) == 0);
-}
-
 // NOTE: sbd (as of at least 1.5.2) uses this
 //! \deprecated Use pcmk_is_set() or pcmk_all_flags_set() instead
 static inline gboolean
 is_set(long long word, long long bit)
 {
     return ((word & bit) == bit);
 }
 
 #ifdef __cplusplus
 }
 #endif
 
 #endif // PCMK__CRM_COMMON_UTIL_COMPAT__H