diff --git a/include/mbedtls/camellia.h b/include/mbedtls/camellia.h
index 8033c13..74a8e34 100644
--- a/include/mbedtls/camellia.h
+++ b/include/mbedtls/camellia.h
@@ -93,6 +93,7 @@
                                 const unsigned char *key,
                                 unsigned int keybits);
 
+#if !defined(MBEDTLS_CIPHER_ENCRYPT_ONLY)
 /**
  * \brief          Perform a CAMELLIA key schedule operation for decryption.
  *
@@ -108,6 +109,7 @@
 int mbedtls_camellia_setkey_dec(mbedtls_camellia_context *ctx,
                                 const unsigned char *key,
                                 unsigned int keybits);
+#endif /* !MBEDTLS_CIPHER_ENCRYPT_ONLY */
 
 /**
  * \brief          Perform a CAMELLIA-ECB block encryption/decryption operation.