diff --git a/reactos/sdk/include/ddk/ndis.h b/reactos/sdk/include/ddk/ndis.h
index b9d0464f979..fef3b2e0f96 100644
--- a/reactos/sdk/include/ddk/ndis.h
+++ b/reactos/sdk/include/ddk/ndis.h
@@ -2293,7 +2293,7 @@ typedef struct _NDIS_MINIPORT_WORK_ITEM {
 } NDIS_MINIPORT_WORK_ITEM, *PNDIS_MINIPORT_WORK_ITEM;
 
 struct _NDIS_WORK_ITEM;
-typedef VOID (*NDIS_PROC)(struct _NDIS_WORK_ITEM *, PVOID);
+typedef VOID (NTAPI *NDIS_PROC)(struct _NDIS_WORK_ITEM *, PVOID);
 
 typedef struct _NDIS_WORK_ITEM {
   PVOID Context;