diff --git a/R/significance_annotation.R b/R/significance_annotation.R
index 825fc3e..ec23153 100644
--- a/R/significance_annotation.R
+++ b/R/significance_annotation.R
@@ -61,6 +61,9 @@ StatSignif <- ggplot2::ggproto("StatSignif", ggplot2::Stat,
                     if("map_signif_level" %in% colnames(data)){
                       map_signif_level <- data[["map_signif_level"]]
                     }
+                    if("tip_length" %in% colnames(data)){
+                      tip_length <-  rep(data[["tip_length"]], each=2)
+                    }
 
                     if(! is.null(comparisons)){
                       i <- 0