diff --git a/reactos/drivers/network/ndis/ndis/40stubs.c b/reactos/drivers/network/ndis/ndis/40stubs.c
index 0057b6018e3..e722b07e495 100644
--- a/reactos/drivers/network/ndis/ndis/40stubs.c
+++ b/reactos/drivers/network/ndis/ndis/40stubs.c
@@ -89,24 +89,6 @@ NdisDeregisterMac(
 }
 
 
-/*
- * @unimplemented
- */
-VOID
-EXPORT
-NdisFreeDmaChannel(
-    IN  PNDIS_HANDLE    NdisDmaHandle)
-/*
- * FUNCTION:
- * ARGUMENTS:
- * NOTES:
- *    NDIS 4.0
- */
-{
-    UNIMPLEMENTED
-}
-
-
 /*
  * @unimplemented
  */
diff --git a/reactos/drivers/network/ndis/ndis/io.c b/reactos/drivers/network/ndis/ndis/io.c
index 1a99a67411d..6dda4554adc 100644
--- a/reactos/drivers/network/ndis/ndis/io.c
+++ b/reactos/drivers/network/ndis/ndis/io.c
@@ -974,5 +974,24 @@ NdisMapIoSpace(
 }
 
 
+/*
+ * @implemented
+ */
+VOID
+EXPORT
+NdisFreeDmaChannel(
+    IN  PNDIS_HANDLE    NdisDmaHandle)
+/*
+ * FUNCTION:
+ * ARGUMENTS:
+ * NOTES:
+ *    NDIS 4.0
+ */
+{
+    NdisMDeregisterDmaChannel(NdisDmaHandle);
+}
+
+
+
 /* EOF */