diff --git a/strings/ctype.cc b/strings/ctype.cc
index 6fd5fb427b6..9dd11c728d4 100644
--- a/strings/ctype.cc
+++ b/strings/ctype.cc
@@ -942,7 +942,14 @@ size_t my_convert(char *to, size_t to_length, const CHARSET_INFO *to_cs,
 
   length = length2 = MY_MIN(to_length, from_length);
 
-#if defined(__i386__) || defined(_WIN32) || defined(__x86_64__)
+#if defined(__x86_64__) || defined(__aarch64__)
+  for (; length >= 8; length -= 8, from += 8, to += 8) {
+    if (uint8korr(from) & 0x8080808080808080) break;
+    int8store(to, uint8korr(from));
+  }
+#endif /* defined(__x86_64__) || defined(__aarch64__) */
+
+#if defined(__i386__) || defined(_WIN32) || defined(__x86_64__) || defined(__aarch64__)
   /*
     Special loop for i386, it allows to refer to a
     non-aligned memory block as UINT32, which makes