diff --git a/reactos/base/system/smss2/smss.h b/reactos/base/system/smss2/smss.h
index 66d8fb43cbc..afbf5508eb2 100644
--- a/reactos/base/system/smss2/smss.h
+++ b/reactos/base/system/smss2/smss.h
@@ -7,7 +7,6 @@
  */
 
 /* DEPENDENCIES ***************************************************************/
-#pragma once
 #ifndef _SM_
 #define _SM_