diff --git a/arch/microblaze/mm/init.c b/arch/microblaze/mm/init.c
index a44892e7cd5b..a57cedf36715 100644
--- a/arch/microblaze/mm/init.c
+++ b/arch/microblaze/mm/init.c
@@ -41,6 +41,7 @@ char *klimit = _end;
  * have available.
  */
 unsigned long memory_start;
+EXPORT_SYMBOL(memory_start);
 unsigned long memory_end; /* due to mm/nommu.c */
 unsigned long memory_size;