diff --git a/rtos/TARGET_CORTEX/rtx5/RTX/Config/RTX_Config.h b/rtos/TARGET_CORTEX/rtx5/RTX/Config/RTX_Config.h
index 4cd0f84a0e..ea5c50b401 100644
--- a/rtos/TARGET_CORTEX/rtx5/RTX/Config/RTX_Config.h
+++ b/rtos/TARGET_CORTEX/rtx5/RTX/Config/RTX_Config.h
@@ -17,7 +17,7 @@
  *
  * -----------------------------------------------------------------------------
  *
- * $Revision:   V5.1.0
+ * $Revision:   V5.2.0
  *
  * Project:     CMSIS-RTOS RTX
  * Title:       RTX Configuration definitions
@@ -181,6 +181,14 @@
 #define OS_IDLE_THREAD_STACK_SIZE   200
 #endif
  
+//   <o>Idle Thread TrustZone Module Identifier
+//   <i> Defines TrustZone Thread Context Management Identifier.
+//   <i> Applies only to cores with TrustZone technology.
+//   <i> Default: 0 (not used)
+#ifndef OS_IDLE_THREAD_TZ_MOD_ID
+#define OS_IDLE_THREAD_TZ_MOD_ID    0
+#endif
+ 
 //   <q>Stack overrun checking
 //   <i> Enable stack overrun checks at thread switch.
 //   <i> Enabling this option increases slightly the execution time of a thread switch.
@@ -242,6 +250,14 @@
 #define OS_TIMER_THREAD_STACK_SIZE  200
 #endif
  
+//   <o>Timer Thread TrustZone Module Identifier
+//   <i> Defines TrustZone Thread Context Management Identifier.
+//   <i> Applies only to cores with TrustZone technology.
+//   <i> Default: 0 (not used)
+#ifndef OS_TIMER_THREAD_TZ_MOD_ID
+#define OS_TIMER_THREAD_TZ_MOD_ID   0
+#endif
+ 
 //   <o>Timer Callback Queue entries <0-256>
 //   <i> Number of concurrent active timer callback functions.
 //   <i> May be set to 0 when timers are not used.
diff --git a/rtos/TARGET_CORTEX/rtx5/RTX/Source/rtx_lib.c b/rtos/TARGET_CORTEX/rtx5/RTX/Source/rtx_lib.c
index 70b18e917a..17e1b6801f 100644
--- a/rtos/TARGET_CORTEX/rtx5/RTX/Source/rtx_lib.c
+++ b/rtos/TARGET_CORTEX/rtx5/RTX/Source/rtx_lib.c
@@ -128,7 +128,12 @@ static const osThreadAttr_t os_idle_thread_attr = {
   &os_idle_thread_stack,
   (uint32_t)sizeof(os_idle_thread_stack),
   osPriorityIdle,
-  0U, 0U
+#if defined(OS_IDLE_THREAD_TZ_MOD_ID)
+  (uint32_t)OS_IDLE_THREAD_TZ_MOD_ID,
+#else
+  0U,
+#endif
+  0U
 };
 
 
@@ -176,7 +181,12 @@ static const osThreadAttr_t os_timer_thread_attr = {
   &os_timer_thread_stack,
   (uint32_t)sizeof(os_timer_thread_stack),
   (osPriority_t)OS_TIMER_THREAD_PRIO,
-  0U, 0U
+#if defined(OS_TIMER_THREAD_TZ_MOD_ID)
+  (uint32_t)OS_TIMER_THREAD_TZ_MOD_ID,
+#else
+  0U,
+#endif
+  0U
 };
 
 // Timer Message Queue Control Block