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diff --git a/pkg/R/F_Zero.R b/pkg/R/F_Zero.R
index 56bb4a5..21e6e00 100644
--- a/pkg/R/F_Zero.R
+++ b/pkg/R/F_Zero.R
@@ -1,7 +1,6 @@
 #' Zero Forecaster
 #'
-#' Flat prediction: always forecast a serie of zeros.
-#' This serie is then adjusted using the ".pjump" function (see \code{Forecaster} class).
+#' Flat prediction: always forecast a serie of zeros (adjusted by 'pjump' function).
 #'
 #' @usage # ZeroForecaster$new(pjump)
 #'
@@ -13,7 +12,7 @@ ZeroForecaster = R6::R6Class("ZeroForecaster",
 	inherit = Forecaster,
 
 	public = list(
-		predictShape = function(data, today, memory, horizon, ...)
-			rep(0, horizon)
+		predictShape = function(data, today, memory, predict_from, horizon, ...)
+			rep(0, (horizon-predict_from+1))
 	)
 )