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-rw-r--r--src/lib/hash/keccak/keccak.h2
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; }