diff --git a/ntoskrnl/ex/init.c b/ntoskrnl/ex/init.c
index 4dadddaa0c7..2953a442e35 100644
--- a/ntoskrnl/ex/init.c
+++ b/ntoskrnl/ex/init.c
@@ -649,6 +649,7 @@ ExpInitSystemPhase0(VOID)
     /* Initialize the Firmware Table resource and listhead */
     InitializeListHead(&ExpFirmwareTableProviderListHead);
     ExInitializeResourceLite(&ExpFirmwareTableResource);
+    ExInitializeResourceLite(&ExpTimeRefreshLock);
 
     /* Set the suite mask to maximum and return */
     ExSuiteMask = 0xFFFFFFFF;
diff --git a/ntoskrnl/include/internal/ex.h b/ntoskrnl/include/internal/ex.h
index a8273001523..66728280125 100644
--- a/ntoskrnl/include/internal/ex.h
+++ b/ntoskrnl/include/internal/ex.h
@@ -16,6 +16,7 @@ extern POBJECT_TYPE ExEventPairObjectType;
 extern POBJECT_TYPE _ExEventObjectType, _ExSemaphoreObjectType;
 extern FAST_MUTEX ExpEnvironmentLock;
 extern ERESOURCE ExpFirmwareTableResource;
+extern ERESOURCE ExpTimeRefreshLock;
 extern LIST_ENTRY ExpFirmwareTableProviderListHead;
 extern BOOLEAN ExpIsWinPEMode;
 extern LIST_ENTRY ExpSystemResourcesList;