diff --git a/lib/maple_tree.c b/lib/maple_tree.c
index 9e2735cbc2b4..ae37a167e25d 100644
--- a/lib/maple_tree.c
+++ b/lib/maple_tree.c
@@ -5726,6 +5726,7 @@ int mas_preallocate(struct ma_state *mas, gfp_t gfp)
 	mas_reset(mas);
 	return ret;
 }
+EXPORT_SYMBOL_GPL(mas_preallocate);
 
 /*
  * mas_destroy() - destroy a maple state.