diff --git a/jackd/controlapi.c b/jackd/controlapi.c
index aea171d..d0776e2 100644
--- a/jackd/controlapi.c
+++ b/jackd/controlapi.c
@@ -191,9 +191,7 @@ jackctl_add_parameter(
     parameter_ptr->driver_ptr = NULL;
     parameter_ptr->driver_parameter_ptr = NULL;
     parameter_ptr->id = 0;
-    //parameter_ptr->constraint_ptr = constraint_ptr;
-    //TODO: need to pass it through.
-    parameter_ptr->constraint_ptr = NULL;
+    parameter_ptr->constraint_ptr = constraint_ptr;
 
     *parameters_list_ptr_ptr = jack_slist_append(*parameters_list_ptr_ptr, parameter_ptr);