cppcheck fixes: Class 'X' has a constructor with 1 argument that is not explicit.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/lib/hash/keccak/keccak.h b/src/lib/hash/keccak/keccak.h
index 7929dd502..a73595d6a 100644
--- a/src/lib/hash/keccak/keccak.h
+++ b/src/lib/hash/keccak/keccak.h
@@ -25,7 +25,7 @@ class BOTAN_DLL Keccak_1600 final : public HashFunction
       * @param output_bits the size of the hash output; must be one of
       *                    224, 256, 384, or 512
       */
-      Keccak_1600(size_t output_bits = 512);
+      explicit Keccak_1600(size_t output_bits = 512);
 
       size_t hash_block_size() const override { return m_bitrate / 8; }
       size_t output_length() const override { return m_output_bits / 8; }