diff --git a/lib/ykpiv.c b/lib/ykpiv.c
index 1a76965..ab58f94 100644
--- a/lib/ykpiv.c
+++ b/lib/ykpiv.c
@@ -873,7 +873,7 @@ ykpiv_rc ykpiv_import_private_key(ykpiv_state *state, const unsigned char key, u
   if (key == YKPIV_KEY_CARDMGM ||
       key < YKPIV_KEY_RETIRED1 ||
       (key > YKPIV_KEY_RETIRED20 && key < YKPIV_KEY_AUTHENTICATION) ||
-      key > YKPIV_KEY_CARDAUTH) {
+      (key > YKPIV_KEY_CARDAUTH && key != YKPIV_KEY_ATTESTATION)) {
     return YKPIV_KEY_ERROR;
   }
 
diff --git a/lib/ykpiv.h b/lib/ykpiv.h
index 9670dee..f567d0e 100644
--- a/lib/ykpiv.h
+++ b/lib/ykpiv.h
@@ -141,6 +141,7 @@ extern "C"
 #define YKPIV_KEY_RETIRED18 0x93
 #define YKPIV_KEY_RETIRED19 0x94
 #define YKPIV_KEY_RETIRED20 0x95
+#define YKPIV_KEY_ATTESTATION 0xf9
 
 #define YKPIV_OBJ_CAPABILITY 0x5fc107
 #define YKPIV_OBJ_CHUID 0x5fc102