diff --git a/include/polarssl/cipher.h b/include/polarssl/cipher.h
index b7d4492..cc69208 100644
--- a/include/polarssl/cipher.h
+++ b/include/polarssl/cipher.h
@@ -80,6 +80,7 @@
     POLARSSL_CIPHER_AES_192_CTR,
     POLARSSL_CIPHER_AES_256_CTR,
     POLARSSL_CIPHER_AES_128_GCM,
+    POLARSSL_CIPHER_AES_192_GCM,
     POLARSSL_CIPHER_AES_256_GCM,
     POLARSSL_CIPHER_CAMELLIA_128_CBC,
     POLARSSL_CIPHER_CAMELLIA_192_CBC,