diff --git a/R/tests_td.R b/R/tests_td.R
index 5368d2d..17b11dc 100644
--- a/R/tests_td.R
+++ b/R/tests_td.R
@@ -35,7 +35,7 @@ NULL
 #' }
 #' \item \code{model = "R011"} the following model is used:
 #' \deqn{
-#' y_t =\beta TD_t +  \varepsilon_t \text{ with }\varepsilon_t \sim ARIMA(0,1,1)(0,1,1)
+#' y_t =\beta TD_t +  \varepsilon_t \text{ with }\varepsilon_t \sim ARIMA(0,1,1)
 #' }
 #' \item \code{model = "R100"} the following model is used:
 #' \deqn{
diff --git a/man/td_f.Rd b/man/td_f.Rd
index 2c92584..67d2963 100644
--- a/man/td_f.Rd
+++ b/man/td_f.Rd
@@ -48,7 +48,7 @@ y_t =\beta TD_t +  \varepsilon_t \text{ with }\varepsilon_t \sim ARIMA(0,1,1)(0,
 }
 \item \code{model = "R011"} the following model is used:
 \deqn{
-y_t =\beta TD_t +  \varepsilon_t \text{ with }\varepsilon_t \sim ARIMA(0,1,1)(0,1,1)
+y_t =\beta TD_t +  \varepsilon_t \text{ with }\varepsilon_t \sim ARIMA(0,1,1)
 }
 \item \code{model = "R100"} the following model is used:
 \deqn{