diff --git a/UPGRADING.INTERNALS b/UPGRADING.INTERNALS
index 24f6a1b96674..d7263bb5cdab 100644
--- a/UPGRADING.INTERNALS
+++ b/UPGRADING.INTERNALS
@@ -33,6 +33,8 @@ PHP 8.7 INTERNALS UPGRADE NOTES
   zend_is_callable(const zval *callable, zend_fcall_info_cache *fcc, char **error)
   from zend_is_callable(const zval *callable, uint32_t check_flags, zend_string **callable_name).
   This new signature covers the most common parameters used with zend_is_callable_ex().
+- Removed zend_hrtime_posix_clock_id. zend_hrtime() always uses CLOCK_MONOTONIC
+  on POSIX platforms.
 
 ========================
 2. Build system changes
diff --git a/Zend/zend_hrtime.c b/Zend/zend_hrtime.c
index b471ee335e1d..25138e62de7d 100644
--- a/Zend/zend_hrtime.c
+++ b/Zend/zend_hrtime.c
@@ -25,8 +25,6 @@
 # include <time.h>
 # include <string.h>
 
-ZEND_API clockid_t zend_hrtime_posix_clock_id = CLOCK_MONOTONIC;
-
 #elif ZEND_HRTIME_PLATFORM_WINDOWS
 
 # define WIN32_LEAN_AND_MEAN
diff --git a/Zend/zend_hrtime.h b/Zend/zend_hrtime.h
index f7d69d19f80b..7cc0c0394cfb 100644
--- a/Zend/zend_hrtime.h
+++ b/Zend/zend_hrtime.h
@@ -70,11 +70,6 @@ ZEND_API extern double zend_hrtime_timer_scale;
 # include <string.h>
 ZEND_API extern mach_timebase_info_data_t zend_hrtime_timerlib_info;
 
-#elif ZEND_HRTIME_PLATFORM_POSIX
-
-/* Not read anymore, kept for ABI compatibility */
-ZEND_API extern clockid_t zend_hrtime_posix_clock_id;
-
 #endif
 
 #define ZEND_NANO_IN_SEC UINT64_C(1000000000)