diff --git a/reactos/include/ndk/rtlfuncs.h b/reactos/include/ndk/rtlfuncs.h
index df26e27cd76..579576b8415 100644
--- a/reactos/include/ndk/rtlfuncs.h
+++ b/reactos/include/ndk/rtlfuncs.h
@@ -3555,8 +3555,23 @@ RtlEnlargedUnsignedMultiply(
     return Product;
 }
 
-#endif
+#if defined(_AMD64_) || defined(_IA64_)
+static __inline
+LARGE_INTEGER
+NTAPI_INLINE
+RtlExtendedLargeIntegerDivide(
+  IN LARGE_INTEGER Dividend,
+  IN ULONG Divisor,
+  OUT PULONG Remainder OPTIONAL)
+{
+  LARGE_INTEGER ret;
+  ret.QuadPart = (ULONG64)Dividend.QuadPart / Divisor;
+  if (Remainder)
+    *Remainder = (ULONG)(Dividend.QuadPart % Divisor);
+  return ret;
+}
 
+#else
 NTSYSAPI
 LARGE_INTEGER
 NTAPI
@@ -3566,6 +3581,11 @@ RtlExtendedLargeIntegerDivide(
     OUT PULONG Remainder OPTIONAL
 );
 
+#endif /* defined(_AMD64_) || defined(_IA64_) */
+
+#endif
+
+
 NTSYSAPI
 ULONG
 NTAPI