diff --git a/mm/nommu.c b/mm/nommu.c
index cbbc1377481981ff26e065dbade356ec90ac0728..1f60194d9b9b436e0d8020c4bc73b5226429b2be 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -45,6 +45,7 @@ int heap_stack_gap = 0;
 
 EXPORT_SYMBOL(mem_map);
 EXPORT_SYMBOL(__vm_enough_memory);
+EXPORT_SYMBOL(num_physpages);
 
 /* list of shareable VMAs */
 struct rb_root nommu_vma_tree = RB_ROOT;