diff --git a/reactos/include/psdk/ntlsa.h b/reactos/include/psdk/ntlsa.h
index 5f982a6297c..80cd8c5f446 100644
--- a/reactos/include/psdk/ntlsa.h
+++ b/reactos/include/psdk/ntlsa.h
@@ -57,7 +57,7 @@ extern "C" {
 #define SECURITY_ACCESS_REMOTE_INTERACTIVE_LOGON      0x00000400
 #define SECURITY_ACCESS_DENY_REMOTE_INTERACTIVE_LOGON 0x00000800
 
-#ifndef _NTSECAPI_H // HACK to avoid redefinition from ntsecapi.h
+#ifdef _NTIFS_INCLUDED_ // HACK to avoid redefinition from ntsecapi.h
 typedef enum _POLICY_AUDIT_EVENT_TYPE
 {
     AuditCategorySystem,