diff --git a/include/transport/utf8/unchecked.h b/include/transport/utf8/unchecked.h
index 3aa1a5dbd8d52a657236804c1685bfc8fadeecc9..540ec5e6d07d9d091d998ce6ccf392a45ebc06c2 100644
--- a/include/transport/utf8/unchecked.h
+++ b/include/transport/utf8/unchecked.h
@@ -45,13 +45,13 @@ namespace utf8
             }
             else if (cp < 0x10000) {              // three octets
                 *(result++) = static_cast<uint8_t>((cp >> 12)         | 0xe0);
-                *(result++) = static_cast<uint8_t>((cp >> 6) & 0x3f   | 0x80);
+                *(result++) = static_cast<uint8_t>(((cp >> 6) & 0x3f) | 0x80);
                 *(result++) = static_cast<uint8_t>((cp & 0x3f)        | 0x80);
             }
             else {                                // four octets
                 *(result++) = static_cast<uint8_t>((cp >> 18)         | 0xf0);
-                *(result++) = static_cast<uint8_t>((cp >> 12)& 0x3f   | 0x80);
-                *(result++) = static_cast<uint8_t>((cp >> 6) & 0x3f   | 0x80);
+                *(result++) = static_cast<uint8_t>(((cp >> 12) & 0x3f)| 0x80);
+                *(result++) = static_cast<uint8_t>(((cp >> 6) & 0x3f) | 0x80);
                 *(result++) = static_cast<uint8_t>((cp & 0x3f)        | 0x80);
             }
             return result;