diff --git a/include/haproxy/clock.h b/include/haproxy/clock.h
index 2cee76da4..dedcacb24 100644
--- a/include/haproxy/clock.h
+++ b/include/haproxy/clock.h
@@ -24,7 +24,6 @@
 
 #include <sys/time.h>
 #include <haproxy/api.h>
-#include <haproxy/tinfo-t.h>
 
 extern struct timeval              start_date;    /* the process's start date in wall-clock time */
 extern volatile ullong             global_now;    /* common monotonic date between all threads (32:32) */
@@ -32,7 +31,7 @@ extern volatile ullong             global_now;    /* common monotonic date betwe
 extern THREAD_LOCAL struct timeval now;           /* internal monotonic date derived from real clock */
 extern THREAD_LOCAL struct timeval date;          /* the real current date (wall-clock time) */
 
-uint64_t now_cpu_time_thread(const struct thread_info *thr);
+uint64_t now_cpu_time_thread(int thr);
 uint64_t now_mono_time(void);
 uint64_t now_cpu_time(void);
 void clock_set_local_source(void);
diff --git a/include/haproxy/compat.h b/include/haproxy/compat.h
index 18eadcc56..be361b31e 100644
--- a/include/haproxy/compat.h
+++ b/include/haproxy/compat.h
@@ -162,8 +162,6 @@ typedef struct { } empty_t;
 
 /* systems without such defines do not know clockid_t or timer_t */
 #if !(_POSIX_TIMERS > 0)
-#undef clockid_t
-#define clockid_t empty_t
 #undef timer_t
 #define timer_t empty_t
 #endif
diff --git a/include/haproxy/tinfo-t.h b/include/haproxy/tinfo-t.h
index 6c09fc456..4d3ff5b4d 100644
--- a/include/haproxy/tinfo-t.h
+++ b/include/haproxy/tinfo-t.h
@@ -33,7 +33,6 @@
  * the pthread identifier which does not exist).
  */
 struct thread_info {
-	clockid_t clock_id;
 	timer_t wd_timer;          /* valid timer or TIMER_INVALID if not set */
 	uint64_t prev_cpu_time;    /* previous per thread CPU time */
 	uint64_t prev_mono_time;   /* previous system wide monotonic time  */
diff --git a/src/clock.c b/src/clock.c
index 517f0a3a5..33d7b4dee 100644
--- a/src/clock.c
+++ b/src/clock.c
@@ -43,6 +43,10 @@ static THREAD_LOCAL unsigned int idle_time;       /* total idle time over curren
 static THREAD_LOCAL unsigned int iso_time_sec;     /* last iso time value for this thread */
 static THREAD_LOCAL char         iso_time_str[34]; /* ISO time representation of gettimeofday() */
 
+#if defined(_POSIX_TIMERS) && (_POSIX_TIMERS > 0) && defined(_POSIX_THREAD_CPUTIME)
+static clockid_t per_thread_clock_id[MAX_THREADS];
+#endif
+
 /* returns the system's monotonic time in nanoseconds if supported, otherwise zero */
 uint64_t now_mono_time(void)
 {
@@ -68,12 +72,12 @@ uint64_t now_cpu_time(void)
 }
 
 /* returns another thread's cumulated CPU time in nanoseconds if supported, otherwise zero */
-uint64_t now_cpu_time_thread(const struct thread_info *thr)
+uint64_t now_cpu_time_thread(int thr)
 {
 	uint64_t ret = 0;
 #if defined(_POSIX_TIMERS) && (_POSIX_TIMERS > 0) && defined(_POSIX_THREAD_CPUTIME)
 	struct timespec ts;
-	clock_gettime(thr->clock_id, &ts);
+	clock_gettime(per_thread_clock_id[thr], &ts);
 	ret = ts.tv_sec * 1000000000ULL + ts.tv_nsec;
 #endif
 	return ret;
@@ -84,9 +88,9 @@ void clock_set_local_source(void)
 {
 #if defined(_POSIX_TIMERS) && (_POSIX_TIMERS > 0) && defined(_POSIX_THREAD_CPUTIME)
 #ifdef USE_THREAD
-	pthread_getcpuclockid(pthread_self(), &ti->clock_id);
+	pthread_getcpuclockid(pthread_self(), &per_thread_clock_id[tid]);
 #else
-	ti->clock_id = CLOCK_THREAD_CPUTIME_ID;
+	per_thread_clock_id[tid] = CLOCK_THREAD_CPUTIME_ID;
 #endif
 #endif
 }
@@ -115,7 +119,7 @@ int clock_setup_signal_timer(void *tmr, int sig, int val)
 	sev.sigev_notify          = SIGEV_SIGNAL;
 	sev.sigev_signo           = sig;
 	sev.sigev_value.sival_int = val;
-	if (timer_create(ti->clock_id, &sev, timer) != -1 ||
+	if (timer_create(per_thread_clock_id[tid], &sev, timer) != -1 ||
 	    timer_create(CLOCK_REALTIME, &sev, timer) != -1)
 		ret = 1;
 #endif
diff --git a/src/debug.c b/src/debug.c
index c5b78edc7..ae3d9aebd 100644
--- a/src/debug.c
+++ b/src/debug.c
@@ -151,7 +151,7 @@ void ha_thread_dump(struct buffer *buf, int thr, int calling_tid)
 {
 	unsigned long thr_bit = 1UL << thr;
 	unsigned long long p = ha_thread_info[thr].prev_cpu_time;
-	unsigned long long n = now_cpu_time_thread(&ha_thread_info[thr]);
+	unsigned long long n = now_cpu_time_thread(thr);
 	int stuck = !!(ha_thread_info[thr].flags & TI_FL_STUCK);
 
 	chunk_appendf(buf,
diff --git a/src/wdt.c b/src/wdt.c
index a893b5d89..87d0cda54 100644
--- a/src/wdt.c
+++ b/src/wdt.c
@@ -65,7 +65,7 @@ void wdt_handler(int sig, siginfo_t *si, void *arg)
 			break;
 
 		p = ha_thread_info[thr].prev_cpu_time;
-		n = now_cpu_time_thread(&ha_thread_info[thr]);
+		n = now_cpu_time_thread(thr);
 
 		/* not yet reached the deadline of 1 sec */
 		if (n - p < 1000000000UL)