diff --git a/epan/libethereal.def b/epan/libethereal.def
index bd0c751aa1..13b51f0381 100644
--- a/epan/libethereal.def
+++ b/epan/libethereal.def
@@ -307,6 +307,7 @@ get_plugins_pers_dir
 get_systemfile_dir
 get_tcp_port
 get_tempfile_path
+get_timedelta
 get_timestamp_setting
 get_udp_port
 gsm_a_bssmap_msg_strings        DATA