diff --git a/openbsc/tests/bsc-nat/bsc_nat_test.c b/openbsc/tests/bsc-nat/bsc_nat_test.c
index 3b5c24e..c2931f9 100644
--- a/openbsc/tests/bsc-nat/bsc_nat_test.c
+++ b/openbsc/tests/bsc-nat/bsc_nat_test.c
@@ -514,6 +514,7 @@
 					       33);
 	nat->mgcp_cfg = mgcp_config_alloc();
 	nat->mgcp_cfg->trunk.number_endpoints = 64;
+	mgcp_endpoints_allocate(&nat->mgcp_cfg->trunk);
 
 	bsc = bsc_connection_alloc(nat);
 	bsc->cfg = bsc_config_alloc(nat, "foo");