diff --git a/R/plot_functions.R b/R/plot_functions.R
index f94f73a1592779fdfb6e48cedc488803189344ab..91ddcc7fdf11025ecf7940f7d1d0b5b41885be44 100644
--- a/R/plot_functions.R
+++ b/R/plot_functions.R
@@ -29,7 +29,7 @@ plot_dendrogram <- function(x) {
     dendro %>% rect.dendrogram(k = kmax)
   } else {
     message(paste("Reversals detected in the dendrogram. Rectangles are not",
-                  "relevant and thus, they not displayed."))
+                  "relevant and thus, they are not displayed."))
   }
   
   # horizontal lines ('range_at')