diff --git a/service/ptos/head/ps/thread.h b/service/ptos/head/ps/thread.h
index 7bf1624..8bcd690 100644
--- a/service/ptos/head/ps/thread.h
+++ b/service/ptos/head/ps/thread.h
@@ -36,6 +36,11 @@ typedef struct _THREAD {
     TAILQ_ENTRY(_THREAD) ThreadLink;
 } THREAD;
 
+/*
+ * Initialize the threading layer
+ */
+VOID PsThreadInit(VOID);
+
 /*
  * Exit the current thread
  *
diff --git a/service/ptos/ke/init.c b/service/ptos/ke/init.c
index 73d0578..b93e238 100644
--- a/service/ptos/ke/init.c
+++ b/service/ptos/ke/init.c
@@ -135,6 +135,9 @@ KiKernelInit(VOID)
     /* Phase 2 init of bootstrap core */
     HalKpcrP2Init(&BootstrapCore);
 
+    /* Initialize threading */
+    PsThreadInit();
+
     /* Initialize the PBI manager */
     ExPbiInit();
 
diff --git a/service/ptos/ps/thread.c b/service/ptos/ps/thread.c
index c9ef638..6136cc8 100644
--- a/service/ptos/ps/thread.c
+++ b/service/ptos/ps/thread.c
@@ -64,3 +64,9 @@ PsExitThread(ULONG ExitCode)
         HalCpuSuspend();
     }
 }
+
+VOID
+PsThreadInit(VOID)
+{
+    SCHED_QUEUE_INIT(&ReaperQueue);
+}