data tree FEATURE anydata copy function made public
diff --git a/src/tree_data_helpers.c b/src/tree_data_helpers.c
index 7551667..28de6a1 100644
--- a/src/tree_data_helpers.c
+++ b/src/tree_data_helpers.c
@@ -206,7 +206,7 @@
     }
 }
 
-LY_ERR
+API LY_ERR
 lyd_any_copy_value(struct lyd_node *trg, const union lyd_any_value *value, LYD_ANYDATA_VALUETYPE value_type)
 {
     struct lyd_node_any *t;