diff --git a/src/include/taler_error_codes.h b/src/include/taler_error_codes.h
index 3a5ef4ae1..4c3eea790 100644
--- a/src/include/taler_error_codes.h
+++ b/src/include/taler_error_codes.h
@@ -947,6 +947,12 @@ enum TALER_ErrorCode
    */
   TALER_EC_CONTRACT_INSTANCE_INCONSISTENT = 2001,
 
+  /**
+   * The backend lacks a wire transfer method configuration option
+   * for the given instance.
+   */
+  TALER_EC_PROPOSAL_INSTANCE_CONFIGURATION_LACKS_WIRE = 2002,
+
   /**
    * The exchange failed to provide a meaningful response
    * to a /deposit request.  This response is provided