diff --git a/mm/mmap.c b/mm/mmap.c
index 0d84b2f..7b36aa7 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -2362,6 +2362,8 @@
 }
 #endif
 
+EXPORT_SYMBOL_GPL(find_extend_vma);
+
 /*
  * Ok - we have the memory areas we should free on the vma list,
  * so release them, and do the vma updates.