diff --git a/libcoap-1.map b/libcoap-1.map
index e451e2e1..4025471d 100644
--- a/libcoap-1.map
+++ b/libcoap-1.map
@@ -1,4 +1,4 @@
-VER_1.0 {
+VER_1 {
 global:
   coap_add_attr;
   coap_add_block;
@@ -62,6 +62,9 @@ global:
   coap_opt_delta;
   coap_opt_encode;
   coap_option_check_critical;
+  coap_option_filter_get;
+  coap_option_filter_set;
+  coap_option_filter_unset;
   coap_option_iterator_init;
   coap_option_next;
   coap_opt_length;
diff --git a/libcoap-1.sym b/libcoap-1.sym
index 900c3e9d..5f657f6a 100644
--- a/libcoap-1.sym
+++ b/libcoap-1.sym
@@ -60,6 +60,9 @@ coap_opt_block_num
 coap_opt_delta
 coap_opt_encode
 coap_option_check_critical
+coap_option_filter_get
+coap_option_filter_set
+coap_option_filter_unset
 coap_option_iterator_init
 coap_option_next
 coap_opt_length