diff --git a/include/openssl/cipher.h b/include/openssl/cipher.h
index a8dd63a..7fbee8b 100644
--- a/include/openssl/cipher.h
+++ b/include/openssl/cipher.h
@@ -410,6 +410,9 @@
 OPENSSL_EXPORT const EVP_CIPHER *EVP_aes_192_ctr(void);
 OPENSSL_EXPORT const EVP_CIPHER *EVP_aes_192_gcm(void);
 
+// EVP_aes_128_cfb128 is only available in decrepit.
+OPENSSL_EXPORT const EVP_CIPHER *EVP_aes_128_cfb128(void);
+
 
 // Private functions.