diff --git a/aos/init.h b/aos/init.h
index 4489c5d..be99a24 100644
--- a/aos/init.h
+++ b/aos/init.h
@@ -23,6 +23,11 @@
 // exit gracefully).
 void Cleanup();
 
+// Locks everything into memory and sets the limits.  This plus InitNRT are
+// everything you need to do before SetCurrentThreadRealtimePriority will make
+// your thread RT.  Called as part of ShmEventLoop::Run()
+void InitRT();
+
 // Performs the realtime parts of initialization after InitNRT(true) has been called.
 void GoRT(int relative_priority = 0);