diff --git a/cmix/nodes/interfaces.go b/cmix/nodes/interfaces.go
index 5d08e6db9a6c97712621ed02ced970e8344e1f00..ddce4b8f21c98f4ed6824e56a6d755be63ee6f82 100644
--- a/cmix/nodes/interfaces.go
+++ b/cmix/nodes/interfaces.go
@@ -27,6 +27,10 @@ type Registrar interface {
 	// to register with nodes.
 	StartProcesses(numParallel uint) stoppable.Stoppable
 
+	// IncreaseParallelNodeRegistration increases the number of parallel node
+	// registrations by num
+	IncreaseParallelNodeRegistration(num int) func() (stoppable.Stoppable, error)
+
 	// GetNodeKeys returns a MixCypher for the topology and a list of nodes it did
 	// not have a key for. If there are missing keys, then returns nil.
 	GetNodeKeys(topology *connect.Circuit) (MixCypher, error)
diff --git a/cmix/nodes/registrar.go b/cmix/nodes/registrar.go
index fedd7ddd338f2afe56139eaa8955f2e04ccd4d4d..0c942b8de091ab1d64b2eb2cc0d67b73c19d0194 100644
--- a/cmix/nodes/registrar.go
+++ b/cmix/nodes/registrar.go
@@ -108,11 +108,11 @@ func (r *registrar) StartProcesses(numParallel uint) stoppable.Stoppable {
 
 // IncreaseParallelNodeRegistration increases the number of parallel node
 // registrations by num
-func (r *registrar) IncreaseParallelNodeRegistration(numParallel uint) func() (stoppable.Stoppable, error) {
+func (r *registrar) IncreaseParallelNodeRegistration(numParallel int) func() (stoppable.Stoppable, error) {
 	return func() (stoppable.Stoppable, error) {
 		multi := stoppable.NewMulti("NodeRegistrationsIncrease")
 
-		for i := uint(0); i < numParallel; i++ {
+		for i := uint(0); i < uint(numParallel); i++ {
 			stop := stoppable.NewSingle("NodeRegistration Increase" + strconv.Itoa(int(i)))
 
 			go registerNodes(r, r.session, stop, &r.inProgress, &r.attempts)