diff --git a/R/plot.OutputsModel.R b/R/plot.OutputsModel.R
index cbff3932c970a44c879d26090e8cd85564ea86a4..438b6e9a17bd3f2153e36e8fbdc76b3af7b6b0a2 100644
--- a/R/plot.OutputsModel.R
+++ b/R/plot.OutputsModel.R
@@ -168,18 +168,15 @@ plot.OutputsModel <- function(x, Qobs = NULL, IndPeriod_Plot = NULL, BasinArea =
       BOOL_TS <- TRUE
       NameTS <- "hour"
       plotunit <- "[mm/h]"
-    }
-    if (inherits(OutputsModel, "daily")) {
+    } else if (inherits(OutputsModel, "daily")) {
       BOOL_TS <- TRUE
       NameTS <- "day"
       plotunit <- "[mm/d]"
-    }
-    if (inherits(OutputsModel, "monthly")) {
+    } else if (inherits(OutputsModel, "monthly")) {
       BOOL_TS <- TRUE
       NameTS <- "month"
       plotunit <- "[mm/month]"
-    }
-    if (inherits(OutputsModel, "yearly")) {
+    } else if (inherits(OutputsModel, "yearly")) {
       BOOL_TS <- TRUE
       NameTS <- "year"
       plotunit <- "[mm/y]"