diff --git a/zlib-Optimize-CRC32.patch b/zlib-Optimize-CRC32.patch
index a11ee46..16d66b4 100644
--- a/zlib-Optimize-CRC32.patch
+++ b/zlib-Optimize-CRC32.patch
@@ -11,8 +11,8 @@ crc32 through the interface provided by the neon instruction
 set.
 Modify by Li Qiang.
 ---
- crc32.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
- 1 file changed, 48 insertions(+)
+ crc32.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++
+ 1 file changed, 50 insertions(+)
 
 diff --git a/crc32.c b/crc32.c
 index f8357b0..5c53068 100644
@@ -28,10 +28,11 @@ index f8357b0..5c53068 100644
  
   /*
    A CRC of a message is computed on N braids of words in the message, where
-@@ -600,6 +603,47 @@ const z_crc_t FAR * ZEXPORT get_crc_table()
+@@ -600,6 +603,49 @@ const z_crc_t FAR * ZEXPORT get_crc_table()
      return (const z_crc_t FAR *)crc_table;
  }
- 
+
++#ifdef __aarch64__
 +ulg crc32_neon(crc, buf, len)
 +    unsigned long crc;
 +    const unsigned char FAR *buf;
@@ -72,6 +73,7 @@ index f8357b0..5c53068 100644
 +
 +    return (crc_result ^ 0xffffffffL);
 +}
++#endif
 +
  /* =========================================================================
   * Use ARM machine instructions if available. This will compute the CRC about