diff --git a/reactos/include/ddk/ntddk.h b/reactos/include/ddk/ntddk.h
index 55569692a96..f9281f95bac 100644
--- a/reactos/include/ddk/ntddk.h
+++ b/reactos/include/ddk/ntddk.h
@@ -2134,6 +2134,7 @@ IoAllocateAdapterChannel(
   IN PVOID Context);
 #endif
 
+#if !defined(DMA_MACROS_DEFINED)
 //DECLSPEC_DEPRECATED_DDK
 NTHALAPI
 PHYSICAL_ADDRESS
@@ -2145,6 +2146,7 @@ IoMapTransfer(
   IN PVOID CurrentVa,
   IN OUT PULONG Length,
   IN BOOLEAN WriteToDevice);
+#endif
 
 NTKERNELAPI
 VOID