diff --git a/src/include/taler_error_codes.h b/src/include/taler_error_codes.h
index 1e942ec8a..cd8852ac7 100644
--- a/src/include/taler_error_codes.h
+++ b/src/include/taler_error_codes.h
@@ -1787,6 +1787,12 @@ enum TALER_ErrorCode
    */
   TALER_EC_BANK_ADD_INCOMING_JSON_INVALID = 5106,
 
+  /**
+   * The client tried a /admin/add/incoming request by using
+   * a currency different from the one the bank operates with.
+   */
+  TALER_EC_BANK_ADD_INCOMING_CURRENCY_MISMATCH = 5111,
+
   /**
    * The client failed to login for /admin/add/incoming.  To be returned
    * along HTTP 401 Unauthorized.