diff --git a/reactos/lib/ntdll/string/memcpy.c b/reactos/lib/ntdll/string/memcpy.c
new file mode 100644
index 00000000000..0e117013f2b
--- /dev/null
+++ b/reactos/lib/ntdll/string/memcpy.c
@@ -0,0 +1,19 @@
+typedef  unsigned int size_t;
+
+void *
+memcpy (char *to, char *from, size_t count);
+
+/* This is the most reliable way to avoid incompatibilities
+   in available built-in functions on various systems.  */
+void *
+memcpy (char *to, char *from, size_t count)
+{
+  register char *f = from;
+  register char *t = to;
+  register int i = count;
+
+  while (i-- > 0)
+    *t++ = *f++;
+
+  return to;
+}