diff --git a/src/libdivecomputer.symbols b/src/libdivecomputer.symbols
index 347db27..da34c2a 100644
--- a/src/libdivecomputer.symbols
+++ b/src/libdivecomputer.symbols
@@ -21,6 +21,7 @@ dc_context_new
 dc_context_free
 dc_context_set_loglevel
 dc_context_set_logfunc
+dc_context_set_custom_serial
 
 dc_iterator_next
 dc_iterator_free