diff --git a/sdk/xtdk/i686/arfuncs.h b/sdk/xtdk/i686/arfuncs.h
index 6a9140f..51ad9e1 100644
--- a/sdk/xtdk/i686/arfuncs.h
+++ b/sdk/xtdk/i686/arfuncs.h
@@ -28,6 +28,10 @@ XTCDECL
 VOID
 ArHalt();
 
+XTAPI
+VOID
+ArInitializeProcessor(VOID);
+
 XTCDECL
 VOID
 ArInvalidateTlbEntry(IN PVOID Address);