diff --git a/bl2/bl2.ld.S b/bl2/bl2.ld.S
index b9275f3..07e0bcc 100644
--- a/bl2/bl2.ld.S
+++ b/bl2/bl2.ld.S
@@ -99,6 +99,11 @@
      */
     __RW_START__ = . ;
 
+    /*
+     * .data must be placed at a lower address than the stacks if the stack
+     * protector is enabled. Alternatively, the .data.stack_protector_canary
+     * section can be placed independently of the main .data section.
+     */
     .data . : {
         __DATA_START__ = .;
         *(.data*)