diff --git a/internal/ethapi/errors.go b/internal/ethapi/errors.go
index 6b12749444..ae38061234 100644
--- a/internal/ethapi/errors.go
+++ b/internal/ethapi/errors.go
@@ -82,6 +82,7 @@ func (e *TxIndexingError) ErrorData() interface{} { return "transaction indexing
 type callError struct {
 	Message string `json:"message"`
 	Code    int    `json:"code"`
+	Data    string `json:"data,omitempty"`
 }
 
 type invalidTxError struct {