diff --git a/src/cfgparse.c b/src/cfgparse.c
index 4b0dc9e51..e3f3d9fae 100644
--- a/src/cfgparse.c
+++ b/src/cfgparse.c
@@ -3571,6 +3571,7 @@ int check_config_validity()
 							goto err;
 						idle_conns[i].cleanup_task->process = srv_cleanup_toremove_connections;
 						idle_conns[i].cleanup_task->context = NULL;
+						HA_SPIN_INIT(&idle_conns[i].toremove_lock);
 						MT_LIST_INIT(&idle_conns[i].toremove_conns);
 					}
 				}