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-rw-r--r--src/lib/mac/cmac/cmac.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/lib/mac/cmac/cmac.h b/src/lib/mac/cmac/cmac.h
index 5a38de28d..0e973b79d 100644
--- a/src/lib/mac/cmac/cmac.h
+++ b/src/lib/mac/cmac/cmac.h
@@ -40,7 +40,7 @@ class BOTAN_DLL CMAC final : public MessageAuthenticationCode
/**
* @param cipher the underlying block cipher to use
*/
- CMAC(BlockCipher* cipher);
+ explicit CMAC(BlockCipher* cipher);
static CMAC* make(const Spec& spec);