diff --git a/include/ntsecapi.h b/include/ntsecapi.h
index 849e72ef33e..d01c04c6867 100644
--- a/include/ntsecapi.h
+++ b/include/ntsecapi.h
@@ -188,7 +188,21 @@ typedef struct _SecHandle
 
 typedef UNICODE_STRING LSA_UNICODE_STRING, *PLSA_UNICODE_STRING;
 typedef STRING LSA_STRING, *PLSA_STRING;
+
+#ifdef _NTDEF_
 typedef OBJECT_ATTRIBUTES LSA_OBJECT_ATTRIBUTES, *PLSA_OBJECT_ATTRIBUTES;
+#else
+typedef struct _LSA_OBJECT_ATTRIBUTES
+{
+    ULONG Length;
+    HANDLE RootDirectory;
+    PLSA_UNICODE_STRING ObjectName;
+    ULONG Attributes;
+    PVOID SecurityDescriptor;
+    PVOID SecurityQualityOfService;
+} LSA_OBJECT_ATTRIBUTES, *PLSA_OBJECT_ATTRIBUTES;
+#endif
+
 
 typedef PVOID LSA_HANDLE, *PLSA_HANDLE;
 typedef ULONG LSA_ENUMERATION_HANDLE, *PLSA_ENUMERATION_HANDLE;