diff --git a/include/ndk/rtlfuncs.h b/include/ndk/rtlfuncs.h
index debd1ee3154..e7365ee0fd0 100644
--- a/include/ndk/rtlfuncs.h
+++ b/include/ndk/rtlfuncs.h
@@ -1689,6 +1689,18 @@ RtlDuplicateUnicodeString(
     OUT PUNICODE_STRING DestinationString
 );
 
+//
+// Memory Functions
+//
+NTSYSAPI
+VOID
+NTAPI
+RtlFillMemoryUlong(
+    IN PVOID Destination,
+    IN ULONG Length,
+    IN ULONG Fill
+);
+
 #endif
 
 NTSYSAPI
@@ -1911,18 +1923,6 @@ RtlLookupAtomInAtomTable(
     OUT PRTL_ATOM Atom
 );
 
-//
-// Memory Functions
-//
-NTSYSAPI
-VOID
-NTAPI
-RtlFillMemoryUlong(
-    IN PVOID Destination,
-    IN ULONG Length,
-    IN ULONG Fill
-);
-
 //
 // Process Management Functions
 //
diff --git a/include/xdk/amd64/ke.h b/include/xdk/amd64/ke.h
index 2ef3c8c8d4d..287eb2c3a25 100644
--- a/include/xdk/amd64/ke.h
+++ b/include/xdk/amd64/ke.h
@@ -103,6 +103,14 @@ KeGetCurrentThread(VOID)
   return (struct _KTHREAD *)__readgsqword(0x188);
 }
 
+/* VOID
+ * KeFlushIoBuffers(
+ *   IN PMDL Mdl,
+ *   IN BOOLEAN ReadOperation,
+ *   IN BOOLEAN DmaOperation)
+ */
+#define KeFlushIoBuffers(_Mdl, _ReadOperation, _DmaOperation)
+
 /* x86 and x64 performs a 0x2C interrupt */
 #define DbgRaiseAssertionFailure __int2c