diff --git a/component/ssr/protocol/protocol.go b/component/ssr/protocol/protocol.go
index 943303da..43c98d0d 100644
--- a/component/ssr/protocol/protocol.go
+++ b/component/ssr/protocol/protocol.go
@@ -12,7 +12,7 @@ var (
 	errAuthAES128IncorrectMAC      = errors.New("auth_aes128_* post decrypt incorrect mac")
 	errAuthAES128DataLengthError   = errors.New("auth_aes128_* post decrypt length mismatch")
 	errAuthAES128IncorrectChecksum = errors.New("auth_aes128_* post decrypt incorrect checksum")
-	errAuthAES128PositionTooLarge  = errors.New("auth_aes128_* post decrypt posision is too large")
+	errAuthAES128PositionTooLarge  = errors.New("auth_aes128_* post decrypt position is too large")
 	errAuthSHA1v4CRC32Error        = errors.New("auth_sha1_v4 post decrypt data crc32 error")
 	errAuthSHA1v4DataLengthError   = errors.New("auth_sha1_v4 post decrypt data length error")
 	errAuthSHA1v4IncorrectChecksum = errors.New("auth_sha1_v4 post decrypt incorrect checksum")