diff --git a/include/polarssl/cipher_wrap.h b/include/polarssl/cipher_wrap.h
index 4dabb44..8485256 100644
--- a/include/polarssl/cipher_wrap.h
+++ b/include/polarssl/cipher_wrap.h
@@ -56,6 +56,7 @@
 
 #if defined(POLARSSL_GCM_C)
 extern const cipher_info_t aes_128_gcm_info;
+extern const cipher_info_t aes_192_gcm_info;
 extern const cipher_info_t aes_256_gcm_info;
 #endif /* POLARSSL_GCM_C */