diff --git a/reactos/include/psdk/ntsecapi.h b/reactos/include/psdk/ntsecapi.h
index 4ea4a2ce143..57a4944603a 100644
--- a/reactos/include/psdk/ntsecapi.h
+++ b/reactos/include/psdk/ntsecapi.h
@@ -665,6 +665,11 @@ typedef struct _TRUSTED_DOMAIN_FULL_INFORMATION {
   TRUSTED_POSIX_OFFSET_INFO PosixOffset;
   TRUSTED_DOMAIN_AUTH_INFORMATION AuthInformation;
 } TRUSTED_DOMAIN_FULL_INFORMATION, *PTRUSTED_DOMAIN_FULL_INFORMATION;
+
+#define RtlGenRandom                    SystemFunction036
+
+BOOLEAN WINAPI RtlGenRandom(PVOID,ULONG);
+
 NTSTATUS NTAPI LsaAddAccountRights(LSA_HANDLE,PSID,PLSA_UNICODE_STRING,ULONG);
 NTSTATUS NTAPI LsaCallAuthenticationPackage(HANDLE,ULONG,PVOID,ULONG,PVOID*,
                             PULONG,PNTSTATUS);