diff --git a/arch/arm/src/rtl8720c/ameba_heap.c b/arch/arm/src/rtl8720c/ameba_heap.c
index f4ae9714c5..7875351a6b 100644
--- a/arch/arm/src/rtl8720c/ameba_heap.c
+++ b/arch/arm/src/rtl8720c/ameba_heap.c
@@ -59,7 +59,7 @@ extern uint32_t __sram_end__;
  * address.
  */
 
-const uintptr_t __attribute__((weak)) g_idle_topstack =
+const uintptr_t weak_data g_idle_topstack =
   ((uintptr_t)&__stack);
 
 /****************************************************************************
diff --git a/arch/xtensa/src/esp32/esp32_spiram.c b/arch/xtensa/src/esp32/esp32_spiram.c
index 4276219cbd..c95f73a78f 100644
--- a/arch/xtensa/src/esp32/esp32_spiram.c
+++ b/arch/xtensa/src/esp32/esp32_spiram.c
@@ -90,7 +90,7 @@ static bool spiram_inited = false;
  * no memory is reserved if no himem function is used.
  */
 
-size_t __attribute__((weak)) esp_himem_reserved_area_size(void)
+size_t weak_function esp_himem_reserved_area_size(void)
 {
   return 0;
 }