diff --git a/src/coreclr/vm/appdomain.cpp b/src/coreclr/vm/appdomain.cpp
index be380486e356ca..c9b85fe68527bc 100644
--- a/src/coreclr/vm/appdomain.cpp
+++ b/src/coreclr/vm/appdomain.cpp
@@ -174,8 +174,8 @@ OBJECTREF *PinnedHeapHandleBucket::TryAllocateEmbeddedFreeHandle()
     }
     CONTRACTL_END;
 
-    OBJECTREF pPreallocatedSentinelObject = ObjectFromHandle(g_pPreallocatedSentinelObject);
-    _ASSERTE(pPreallocatedSentinelObject  != NULL);
+    OBJECTREF pPreallocatedSentinelObject = g_pPreallocatedSentinelObject;
+    _ASSERTE(pPreallocatedSentinelObject != NULL);
 
     for (int  i = m_CurrentEmbeddedFreePos; i < m_CurrentPos; i++)
     {
@@ -405,8 +405,8 @@ void PinnedHeapHandleTable::ReleaseHandlesLocked(OBJECTREF *pObjRef, DWORD nRele
     _ASSERTE(m_Crst.OwnedByCurrentThread());
 #endif
 
-    OBJECTREF pPreallocatedSentinelObject = ObjectFromHandle(g_pPreallocatedSentinelObject);
-    _ASSERTE(pPreallocatedSentinelObject  != NULL);
+    OBJECTREF pPreallocatedSentinelObject = g_pPreallocatedSentinelObject;
+    _ASSERTE(pPreallocatedSentinelObject != NULL);
 
 
     // Add the released handles to the list of available handles.
@@ -807,8 +807,14 @@ void SystemDomain::PreallocateSpecialObjects()
 
     _ASSERTE(g_pPreallocatedSentinelObject == NULL);
 
-    OBJECTREF pPreallocatedSentinelObject = AllocateObject(g_pObjectClass);
-    g_pPreallocatedSentinelObject = AppDomain::GetCurrentDomain()->CreatePinningHandle( pPreallocatedSentinelObject );
+    g_pPreallocatedSentinelObject = TryAllocateFrozenObject(g_pObjectClass);
+    if (g_pPreallocatedSentinelObject == NULL)
+    {
+        OBJECTREF pPreallocatedSentinelObject = AllocateObject(g_pObjectClass);
+        // Keep the fallback object alive and immovable for the lifetime of the runtime.
+        OBJECTHANDLE handle = AppDomain::GetCurrentDomain()->CreatePinningHandle(pPreallocatedSentinelObject);
+        g_pPreallocatedSentinelObject = ObjectFromHandle(handle);
+    }
 }
 
 void SystemDomain::CreatePreallocatedExceptions()
diff --git a/src/coreclr/vm/vars.cpp b/src/coreclr/vm/vars.cpp
index ae813d80f56c72..3a1f1c766300d4 100644
--- a/src/coreclr/vm/vars.cpp
+++ b/src/coreclr/vm/vars.cpp
@@ -124,11 +124,11 @@ GVAL_IMPL_INIT(PTR_WSTR, g_EntryAssemblyPath, NULL);
 
 #ifndef DACCESS_COMPILE
 
-// <TODO> @TODO - PROMOTE. </TODO>
 OBJECTHANDLE         g_pPreallocatedOutOfMemoryException;
 OBJECTHANDLE         g_pPreallocatedStackOverflowException;
 OBJECTHANDLE         g_pPreallocatedExecutionEngineException;
-OBJECTHANDLE         g_pPreallocatedSentinelObject;
+
+OBJECTREF            g_pPreallocatedSentinelObject = NULL;
 
 //
 //
diff --git a/src/coreclr/vm/vars.hpp b/src/coreclr/vm/vars.hpp
index 49334c9953d73e..2d3560af03b931 100644
--- a/src/coreclr/vm/vars.hpp
+++ b/src/coreclr/vm/vars.hpp
@@ -396,14 +396,12 @@ GVAL_DECL(PTR_WSTR, g_EntryAssemblyPath);
 // Global System Information
 extern SYSTEM_INFO g_SystemInfo;
 
-// <TODO>@TODO - PROMOTE.</TODO>
-// <TODO>@TODO - I'd like to make these private members of CLRException some day.</TODO>
 EXTERN OBJECTHANDLE         g_pPreallocatedOutOfMemoryException;
 EXTERN OBJECTHANDLE         g_pPreallocatedStackOverflowException;
 EXTERN OBJECTHANDLE         g_pPreallocatedExecutionEngineException;
 
 // we use this as a dummy object to indicate free space in the handle tables -- this object is never visible to the world
-EXTERN OBJECTHANDLE         g_pPreallocatedSentinelObject;
+EXTERN OBJECTREF            g_pPreallocatedSentinelObject;
 
 EXTERN MethodTable*         g_pCastHelpers;