diff --git a/fido2/extensions/solo.c b/fido2/extensions/solo.c
index f539138..eff6eef 100644
--- a/fido2/extensions/solo.c
+++ b/fido2/extensions/solo.c
@@ -38,7 +38,7 @@ int16_t bridge_u2f_to_solo(uint8_t * _chal, uint8_t * _appid, uint8_t klen, uint
 
     wallet_request * req = (wallet_request *) keyh;
 
-    printf1(TAG_WALLET, "u2f-solo [%d]: ", reqlen); dump_hex1(TAG_WALLET, keyh, klen);
+    printf1(TAG_WALLET, "u2f-solo [%d]: ", klen); dump_hex1(TAG_WALLET, keyh, klen);
 
     switch(req->operation)
     {