diff --git a/arch/arm/src/imxrt/imxrt_start.c b/arch/arm/src/imxrt/imxrt_start.c
index cc51d70e4ebac..107e03dae1879 100644
--- a/arch/arm/src/imxrt/imxrt_start.c
+++ b/arch/arm/src/imxrt/imxrt_start.c
@@ -149,11 +149,16 @@ void __start(void)
   const register uint32_t *src;
   register uint32_t *dest;
 
-  /* Make sure that interrupts are disabled and set SP */
+  /* Make sure that interrupts are disabled and set MSP */
 
   __asm__ __volatile__ ("\tcpsid  i\n");
   __asm__ __volatile__ ("MSR MSP, %0\n" : : "r" (IDLE_STACK) :);
 
+  /* Make sure that we use MSP from now on */
+
+  __asm__ __volatile__ ("MSR CONTROL, %0\n" : : "r" (0) :);
+  __asm__ __volatile__ ("ISB SY\n");
+
   /* Make sure VECTAB is set to NuttX vector table
    * and not the one from the boot ROM and have consistency
    * with debugger that automatically set the VECTAB