diff --git a/port/stm32-f4discovery-cc256x/STM32F407VGTx_FLASH.ld b/port/stm32-f4discovery-cc256x/STM32F407VGTx_FLASH.ld
index 6f5f7b1ed..64613e809 100644
--- a/port/stm32-f4discovery-cc256x/STM32F407VGTx_FLASH.ld
+++ b/port/stm32-f4discovery-cc256x/STM32F407VGTx_FLASH.ld
@@ -110,20 +110,20 @@ SECTIONS
     __exidx_end = .;
   } >FLASH
 
-  .preinit_array     :
+  .preinit_array (READONLY) :
   {
     PROVIDE_HIDDEN (__preinit_array_start = .);
     KEEP (*(.preinit_array*))
     PROVIDE_HIDDEN (__preinit_array_end = .);
   } >FLASH
-  .init_array :
+  .init_array (READONLY) :
   {
     PROVIDE_HIDDEN (__init_array_start = .);
     KEEP (*(SORT(.init_array.*)))
     KEEP (*(.init_array*))
     PROVIDE_HIDDEN (__init_array_end = .);
   } >FLASH
-  .fini_array :
+  .fini_array (READONLY) :
   {
     PROVIDE_HIDDEN (__fini_array_start = .);
     KEEP (*(SORT(.fini_array.*)))