diff --git a/master/master.c b/master/master.c
index e2d931f8..dfe39081 100644
--- a/master/master.c
+++ b/master/master.c
@@ -2505,6 +2505,7 @@ void ecrt_master_deactivate(ec_master_t *master)
 
     if (!master->active) {
         EC_MASTER_WARN(master, "%s: Master not active.\n", __func__);
+        ec_master_clear_config(master);
         return;
     }