diff --git a/ntioapi.h b/ntioapi.h
index 9c556c1..a1e4b39 100644
--- a/ntioapi.h
+++ b/ntioapi.h
@@ -1230,6 +1230,24 @@ NtQueryDirectoryFile(
     _In_ BOOLEAN RestartScan
     );
 
+#if (PHNT_VERSION >= PHNT_REDSTONE3)
+NTSYSCALLAPI
+NTSTATUS
+NTAPI
+NtQueryDirectoryFileEx(
+	_In_ HANDLE FileHandle,
+	_In_opt_ HANDLE Event,
+	_In_opt_ PIO_APC_ROUTINE ApcRoutine,
+	_In_opt_ PVOID ApcContext,
+	_Out_ PIO_STATUS_BLOCK IoStatusBlock,
+	_Out_ PVOID FileInformation,
+	_In_ ULONG Length,
+	_In_ FILE_INFORMATION_CLASS FileInformationClass,
+	_In_ ULONG QueryFlags,
+	_In_opt_ PUNICODE_STRING FileName
+);
+#endif
+
 NTSYSCALLAPI
 NTSTATUS
 NTAPI