Index: libcfa/src/concurrency/kernel/startup.cfa
===================================================================
--- libcfa/src/concurrency/kernel/startup.cfa	(revision 6a9b12b713043629c9e3dd774ca05bc38a58822a)
+++ libcfa/src/concurrency/kernel/startup.cfa	(revision fc59b580bf1b688acdfb86f4e29cc1f5c54fae03)
@@ -492,4 +492,5 @@
 	uint_fast32_t last_size = ready_mutate_register((__processor_id_t*)&this);
 		int target = this.cltr->procs.total += 1u;
+		insert_last(this.cltr->procs.actives, this);
 
 		// Adjust the ready queue size
@@ -507,4 +508,5 @@
 	uint_fast32_t last_size = ready_mutate_lock();
 		int target = this.cltr->procs.total -= 1u;
+		remove(this);
 
 		// Adjust the ready queue size