diff --git a/daemon/call.c b/daemon/call.c
index 3b59ef24f..4fe2f9741 100644
--- a/daemon/call.c
+++ b/daemon/call.c
@@ -5528,6 +5528,7 @@ static void __call_free(call_t *c) {
 
 	memory_arena_free_lw(c->callid.s);
 	memory_arena_free_lw(c->created_from.s);
+	memory_arena_free_lw(c->xmlrpc_callback.s);
 
 	memory_arena = NULL;
 	arena_free(&c->buffer);
diff --git a/daemon/call_interfaces.c b/daemon/call_interfaces.c
index 2cc894ced..a914742ce 100644
--- a/daemon/call_interfaces.c
+++ b/daemon/call_interfaces.c
@@ -612,7 +612,7 @@ static const char *call_offer_answer_ng(ng_command_ctx_t *ctx, const char *addr)
 	updated_created_from(call, addr);
 
 	if (flags.xmlrpc_callback.len)
-		call->xmlrpc_callback = call_str_cpy(&flags.xmlrpc_callback);
+		memory_arena_str_cpy_free(&call->xmlrpc_callback, &flags.xmlrpc_callback);
 	if (flags.dtmf_log_dest.address.family)
 		call->dtmf_log_dest = flags.dtmf_log_dest;