diff --git a/NAMESPACE b/NAMESPACE
index 6700753..5178ab0 100644
--- a/NAMESPACE
+++ b/NAMESPACE
@@ -29,6 +29,7 @@ export(week_breaks)
 importFrom(ape,as.phylo)
 importFrom(ggplot2,aes)
 importFrom(ggplot2,autoplot)
+importFrom(ggplot2,rel)
 importFrom(ggplot2,waiver)
 importFrom(grid,unit)
 importFrom(rlang,"%||%")
diff --git a/R/plot_calendar.R b/R/plot_calendar.R
index e7736be..53da6fb 100644
--- a/R/plot_calendar.R
+++ b/R/plot_calendar.R
@@ -76,6 +76,7 @@ plot_calendar <- function(
   if (missing(phylepic)) wrapper else wrapper(phylepic)
 }
 
+#' @importFrom ggplot2 rel
 theme_plot_calendar <- function() {
   ggplot2::theme(
     axis.title.y = ggplot2::element_blank(),