diff --git a/os/rt/include/chsys.h b/os/rt/include/chsys.h
index 2449ad31c..eead5749e 100644
--- a/os/rt/include/chsys.h
+++ b/os/rt/include/chsys.h
@@ -52,6 +52,18 @@
 /* Derived constants and error checks.                                       */
 /*===========================================================================*/
 
+#if defined(PORT_CORE0_BSS_SECTION) || defined(__DOXYGEN__)
+#define CH_SYS_CORE0_ALLOCATE               PORT_CORE0_BSS_SECTION
+#else
+#define CH_SYS_CORE0_ALLOCATE               /* Default.*/
+#endif
+
+#if defined(PORT_CORE1_BSS_SECTION) || defined(__DOXYGEN__)
+#define CH_SYS_CORE1_ALLOCATE               PORT_CORE1_BSS_SECTION
+#else
+#define CH_SYS_CORE1_ALLOCATE               /* Default.*/
+#endif
+
 /*===========================================================================*/
 /* Module data structures and types.                                         */
 /*===========================================================================*/
diff --git a/os/rt/src/chsys.c b/os/rt/src/chsys.c
index 74013210b..f5e13fd59 100644
--- a/os/rt/src/chsys.c
+++ b/os/rt/src/chsys.c
@@ -47,12 +47,14 @@ ch_system_t ch_system;
 /**
  * @brief   Core 0 OS instance.
  */
+CH_SYS_CORE0_ALLOCATE
 os_instance_t ch0;
 
 #if (CH_CFG_NO_IDLE_THREAD == FALSE) || defined(__DOXYGEN__)
 /**
  * @brief   Working area for core 0 idle thread.
  */
+CH_SYS_CORE0_ALLOCATE
 static THD_WORKING_AREA(ch_c0_idle_thread_wa, PORT_IDLE_THREAD_STACK_SIZE);
 
 #if CH_DBG_ENABLE_STACK_CHECK == TRUE
@@ -82,12 +84,14 @@ const os_instance_config_t ch_core0_cfg = {
 /**
  * @brief   Core 1 OS instance.
  */
+CH_SYS_CORE1_ALLOCATE
 os_instance_t ch1;
 
 #if (CH_CFG_NO_IDLE_THREAD == FALSE) || defined(__DOXYGEN__)
 /**
  * @brief   Working area for core 1 idle thread.
  */
+CH_SYS_CORE1_ALLOCATE
 static THD_WORKING_AREA(ch_c1_idle_thread_wa, PORT_IDLE_THREAD_STACK_SIZE);
 #endif