diff --git a/src/exchange/taler-exchange-httpd_keys.h b/src/exchange/taler-exchange-httpd_keys.h
index be9548fec..2a74304e9 100644
--- a/src/exchange/taler-exchange-httpd_keys.h
+++ b/src/exchange/taler-exchange-httpd_keys.h
@@ -148,7 +148,7 @@ TEH_keys_denomination_by_hash (const struct GNUNET_HashCode *h_denom_pub,
  *
  * @param ksh key state state to look in
  * @param h_denom_pub hash of denomination public key
- * @param[in,out] connection used to return status message if NULL is returned
+ * @param[in,out] conn connection used to return status message if NULL is returned
  * @param[out] mret set to the MHD status if NULL is returned
  * @return the denomination key issue,
  *         or NULL if @a h_denom_pub could not be found