diff --git a/os/rt/include/chstats.h b/os/rt/include/chstats.h
index 1bd7c97e7..54fdaea3a 100644
--- a/os/rt/include/chstats.h
+++ b/os/rt/include/chstats.h
@@ -102,6 +102,10 @@ static inline void __stats_object_init(kernel_stats_t *ksp) {
   ksp->n_ctxswc = (ucnt_t)0;
   chTMObjectInit(&ksp->m_crit_thd);
   chTMObjectInit(&ksp->m_crit_isr);
+
+  /* The initialization code will stop the measurement on the final call
+     to chSysUnlock().*/
+  chTMStartMeasurementX(&ksp->m_crit_thd);
 }
 
 #else /* CH_DBG_STATISTICS == FALSE */
diff --git a/readme.txt b/readme.txt
index 0c7b052dd..a81a234a6 100644
--- a/readme.txt
+++ b/readme.txt
@@ -121,9 +121,11 @@
        ARMv7-M and ARMv8-M-ML.
 - NEW: On STM32WBxx added a check on STM32_LSI_ENABLE required by IWDG.
 - NEW: Added SPIv2 support also to STM32WB and STM32WL.
+- FIX: Reverted bug #1100 (backported to 20.3.5)(backported to 21.11.2).
+- FIX: Fixed invalid cumulative time stat in RT (bug #1222)
+       (backported to 21.11.2).
 - FIX: Fixed incorrect type cast in TIME_I2US() (bug #1221)
        (backported to 20.3.5)(backported to 21.11.2).
-- FIX: Reverted bug #1100 (backported to 20.3.5)(backported to 21.11.2).
 - FIX: Fixed missing clock disable for STM32 OCTOSPI2 (bug #1220)
        (backported to 20.3.5)(backported to 21.11.2).
 - FIX: Fixed wrong condition in STM32 sio_lld_read() function (bug #1219)