diff --git a/targets/TARGET_STM/mbed_rtx.h b/targets/TARGET_STM/mbed_rtx.h
index 5ced8276c1..8d214c5c30 100644
--- a/targets/TARGET_STM/mbed_rtx.h
+++ b/targets/TARGET_STM/mbed_rtx.h
@@ -19,128 +19,6 @@
 
 #include <stdint.h>
 
-#ifndef INITIAL_SP
-
-#if (defined(TARGET_STM32L475VG) ||\
-     defined(TARGET_STM32L476RG) ||\
-     defined(TARGET_STM32L476JG) ||\
-     defined(TARGET_STM32L476VG) ||\
-     defined(TARGET_STM32L486RG) ||\
-     defined(TARGET_STM32L471QG))
-/* only GCC_ARM and IAR toolchains have the stack on SRAM2 */
-#if (((defined(__GNUC__) && !defined(__CC_ARM)) ||\
-       defined(__IAR_SYSTEMS_ICC__ )) &&\
-       defined(TWO_RAM_REGIONS))
-#define INITIAL_SP              (0x10008000UL)
-#else
-#define INITIAL_SP              (0x20018000UL)
-#endif /* toolchains */
-
-#elif (defined(TARGET_STM32H747xI) && defined(CORE_CM4))
-#define INITIAL_SP              (0x10008000UL)
-
-#elif (defined(TARGET_STM32F051R8) ||\
-       defined(TARGET_STM32F100RB) ||\
-       defined(TARGET_STM32L031K6) ||\
-       defined(TARGET_STM32L053C8) ||\
-       defined(TARGET_STM32L053R8))
-#define INITIAL_SP              (0x20002000UL)
-
-#elif (defined(TARGET_STM32F303K8) ||\
-       defined(TARGET_STM32F334C8) ||\
-       defined(TARGET_STM32F334R8))
-#define INITIAL_SP              (0x20003000UL)
-
-#elif (defined(TARGET_STM32F070RB) ||\
-       defined(TARGET_STM32F072RB) ||\
-       defined(TARGET_STM32F302R8))
-#define INITIAL_SP              (0x20004000UL)
-
-#elif (defined(TARGET_STM32F103RB) ||\
-       defined(TARGET_STM32F103C8) ||\
-       defined(TARGET_STM32L072CZ) ||\
-       defined(TARGET_STM32L073RZ) ||\
-       defined(TARGET_STM32L0x2xZ))
-#define INITIAL_SP              (0x20005000UL)
-
-#elif (defined(TARGET_STM32F091xC) ||\
-       defined(TARGET_STM32F410RB) ||\
-       defined(TARGET_STM32L151CBA)||\
-       defined(TARGET_STM32L151CC) ||\
-       defined(TARGET_STM32L151RC) ||\
-       defined(TARGET_STM32L152RC))
-#define INITIAL_SP              (0x20008000UL)
-
-#elif (defined(TARGET_STM32G071RB))
-#define INITIAL_SP              (0x20009000UL)
-
-#elif defined(TARGET_STM32F303VC)
-#define INITIAL_SP              (0x2000A000UL)
-
-#elif defined(TARGET_STM32L443RC)
-#define INITIAL_SP              (0x2000C000UL)
-
-#elif (defined(TARGET_STM32F303RE) ||\
-       defined(TARGET_STM32F303ZE) ||\
-       defined(TARGET_STM32F401VC) ||\
-       defined(TARGET_STM32L432KC) ||\
-       defined(TARGET_STM32L433RC))
-#define INITIAL_SP              (0x20010000UL)
-
-#elif defined(TARGET_STM32L152RE)
-#define INITIAL_SP              (0x20014000UL)
-
-#elif (defined(TARGET_STM32F401RE) ||\
-       defined(TARGET_STM32F401VE))
-#define INITIAL_SP              (0x20018000UL)
-
-#elif (defined(TARGET_STM32F207ZG) ||\
-       defined(TARGET_STM32F405RG) ||\
-       defined(TARGET_STM32F407xG) ||\
-       defined(TARGET_STM32F407VE) ||\
-       defined(TARGET_STM32F411RE) ||\
-       defined(TARGET_STM32F446RE) ||\
-       defined(TARGET_STM32F446VE) ||\
-       defined(TARGET_STM32F446ZE) ||\
-       defined(TARGET_STM32H743xI) ||\
-       defined(TARGET_STM32H753xI) ||\
-       defined(TARGET_STM32H747xI))
-#define INITIAL_SP              (0x20020000UL)
-
-#elif (defined(TARGET_STM32F429ZI) ||\
-       defined(TARGET_STM32F437VG) ||\
-       defined(TARGET_STM32F439VI) ||\
-       defined(TARGET_STM32F439ZI) ||\
-       defined(TARGET_STM32WB55RG))
-#define INITIAL_SP              (0x20030000UL)
-
-#elif defined(TARGET_STM32F412ZG)
-#define INITIAL_SP              (0x20040000UL)
-
-#elif (defined(TARGET_STM32F413ZH) ||\
-       defined(TARGET_STM32F469NI) ||\
-       defined(TARGET_STM32F746xG) ||\
-       defined(TARGET_STM32F756xG) ||\
-       defined(TARGET_STM32L496AG) ||\
-       defined(TARGET_STM32L496ZG))
-#define INITIAL_SP              (0x20050000UL)
-
-#elif (defined(TARGET_STM32F767xI) ||\
-       defined(TARGET_STM32F769xI))
-#define INITIAL_SP              (0x20080000UL)
-
-#elif defined(TARGET_STM32L4R5xI)
-#define INITIAL_SP              (0x200A0000UL)
-
-#elif defined(TARGET_STM32L4R9xI)
-#define INITIAL_SP              (0x200A0000UL)
-
-#else
-#error "INITIAL_SP is not defined for this target in the mbed_rtx.h file"
-#endif
-
-#endif // INITIAL_SP
-
 #if (defined(TARGET_STM32F070RB) || defined(TARGET_STM32F072RB))
 #ifdef MBED_CONF_RTOS_MAIN_THREAD_STACK_SIZE
 #undef MBED_CONF_RTOS_MAIN_THREAD_STACK_SIZE