1 files changed, 2 insertions, 2 deletions
diff --git a/src/lib/modes/cbc/cbc.h b/src/lib/modes/cbc/cbc.h
index 9a767d3a0..961991d4a 100644
--- a/src/lib/modes/cbc/cbc.h
+++ b/src/lib/modes/cbc/cbc.h
@@ -80,7 +80,7 @@ class BOTAN_DLL CBC_Encryption : public CBC_Mode
 class BOTAN_DLL CTS_Encryption final : public CBC_Encryption
    {
    public:
-      CTS_Encryption(BlockCipher* cipher) : CBC_Encryption(cipher, nullptr) {}
+      explicit CTS_Encryption(BlockCipher* cipher) : CBC_Encryption(cipher, nullptr) {}
 
       size_t output_length(size_t input_length) const override;
 
@@ -117,7 +117,7 @@ class BOTAN_DLL CBC_Decryption : public CBC_Mode
 class BOTAN_DLL CTS_Decryption final : public CBC_Decryption
    {
    public:
-      CTS_Decryption(BlockCipher* cipher) : CBC_Decryption(cipher, nullptr) {}
+      explicit CTS_Decryption(BlockCipher* cipher) : CBC_Decryption(cipher, nullptr) {}
 
       void finish(secure_vector<byte>& final_block, size_t offset = 0) override;