diff --git a/tds.go b/tds.go
index e1b63300..27c8c76e 100644
--- a/tds.go
+++ b/tds.go
@@ -1205,10 +1205,10 @@ initiate_connection:
 				loginAck = true
 			case doneStruct:
 				if token.isError() {
-					return nil, fmt.Errorf("login error: %s", token.getError())
+					return nil, fmt.Errorf("login error: %w", token.getError())
 				}
 			case error:
-				return nil, fmt.Errorf("login error: %s", token.Error())
+				return nil, fmt.Errorf("login error: %w", token)
 			}
 		}
 	}