diff --git a/reactos/include/psdk/ks.h b/reactos/include/psdk/ks.h
index ad5d3017980..4b173b9cff7 100644
--- a/reactos/include/psdk/ks.h
+++ b/reactos/include/psdk/ks.h
@@ -1309,6 +1309,7 @@ typedef struct
 {
 } KSOBJECT_CREATE, *PKSOBJECT_CREATE;
 
+#if defined(__NTDDK_H)
 typedef struct
 {
     PDRIVER_DISPATCH       Create;
@@ -1318,9 +1319,12 @@ typedef struct
     ULONG                  Flags;
 } KSOBJECT_CREATE_ITEM, *PKSOBJECT_CREATE_ITEM;
 
+
 typedef VOID (*PFNKSITEMFREECALLBACK)(
     IN  PKSOBJECT_CREATE_ITEM CreateItem);
 
+#endif
+
 typedef struct {
     ULONG    Size;
     ULONG    Count;