diff --git a/contrib/libunbound.so.conf b/contrib/libunbound.so.conf
index 3b78fca7f..7cf26fee4 100644
--- a/contrib/libunbound.so.conf
+++ b/contrib/libunbound.so.conf
@@ -14,6 +14,7 @@ int ub_ctx_set_option(ub_ctx*, string, string);
 int ub_ctx_get_option(ub_ctx*, string, +string*);
 int ub_ctx_config(ub_ctx*, string);
 int ub_ctx_set_fwd(ub_ctx*, string);
+int ub_ctx_set_tls(ub_ctx*, bool(int));
 int ub_ctx_set_stub(ub_ctx*, string, string, bool(int));
 int ub_ctx_resolvconf(ub_ctx*, string);
 int ub_ctx_hosts(ub_ctx*, string);
diff --git a/doc/Changelog b/doc/Changelog
index 70f0f71ab..ea8bfe8ff 100644
--- a/doc/Changelog
+++ b/doc/Changelog
@@ -1,3 +1,7 @@
+31 January 2019: Wouter
+	- Set ub_ctx_set_tls call signature in ltrace config file for
+	  libunbound in contrib/libunbound.so.conf.
+
 30 January 2019: Ralph
 	- Fix case in which query timeout can result in marking delegation
 	  as edns_lame_known.