diff --git a/src/libsodium/include/sodium/utils.h b/src/libsodium/include/sodium/utils.h
index 49e3abfe..2ef22777 100644
--- a/src/libsodium/include/sodium/utils.h
+++ b/src/libsodium/include/sodium/utils.h
@@ -77,7 +77,7 @@ int sodium_hex2bin(unsigned char *const bin, const size_t bin_maxlen, const char
 #define sodium_base64_ENCODED_LEN(BIN_LEN, VARIANT)                                              \
     (((BIN_LEN) / 3U) * 4U +                                                                     \
      ((((BIN_LEN) - ((BIN_LEN) / 3U) * 3U) | (((BIN_LEN) - ((BIN_LEN) / 3U) * 3U) >> 1)) & 1U) * \
-         (4U - (~((((VARIANT) & 2U) >> 1) - 1U) & (3U - ((BIN_LEN) - ((BIN_LEN) / 3U) * 3U)))) + \
+         (4U - ((0U - (((VARIANT) & 2U) >> 1)) & (3U - ((BIN_LEN) - ((BIN_LEN) / 3U) * 3U)))) + \
      1U)
 
 SODIUM_EXPORT