diff --git a/include/ntsecapi.h b/include/ntsecapi.h
index a73e603c6e0..7fa3c441ede 100644
--- a/include/ntsecapi.h
+++ b/include/ntsecapi.h
@@ -179,6 +179,32 @@ typedef struct _POLICY_ACCOUNT_DOMAIN_INFO
     PSID DomainSid;
 } POLICY_ACCOUNT_DOMAIN_INFO, *PPOLICY_ACCOUNT_DOMAIN_INFO;
 
+typedef struct _POLICY_DNS_DOMAIN_INFO
+{
+    LSA_UNICODE_STRING Name;
+    LSA_UNICODE_STRING DnsDomainName;
+    LSA_UNICODE_STRING DnsForestName;
+    GUID DomainGuid;
+    PSID Sid;
+} POLICY_DNS_DOMAIN_INFO, *PPOLICY_DNS_DOMAIN_INFO;
+
+typedef enum _POLICY_LSA_SERVER_ROLE
+{
+    PolicyServerRoleBackup = 2,
+    PolicyServerRolePrimary
+} POLICY_LSA_SERVER_ROLE, *PPOLICY_LSA_SERVER_ROLE;
+
+typedef struct _POLICY_LSA_SERVER_ROLE_INFO
+{
+    POLICY_LSA_SERVER_ROLE LsaServerRole;
+} POLICY_LSA_SERVER_ROLE_INFO, *PPOLICY_LSA_SERVER_ROLE_INFO;
+
+typedef struct _POLICY_MODIFICATION_INFO
+{
+    LARGE_INTEGER ModifiedId;
+    LARGE_INTEGER DatabaseCreationTime;
+} POLICY_MODIFICATION_INFO, *PPOLICY_MODIFICATION_INFO;
+
 typedef struct
 {
     SID_NAME_USE Use;