diff --git a/include/polarssl/pk.h b/include/polarssl/pk.h
index 7014e42..1309f70 100644
--- a/include/polarssl/pk.h
+++ b/include/polarssl/pk.h
@@ -99,6 +99,7 @@
     POLARSSL_PK_ECKEY_DH,
     POLARSSL_PK_ECDSA,
     POLARSSL_PK_RSA_ALT,
+    POLARSSL_PK_RSASSA_PSS,
 } pk_type_t;
 
 /**