diff --git a/R/resistance_predict.R b/R/resistance_predict.R
index bd1f70fb..e9293035 100755
--- a/R/resistance_predict.R
+++ b/R/resistance_predict.R
@@ -98,8 +98,10 @@
 #'                        model = "binomial",
 #'                        info = FALSE,
 #'                        minimum = 15)
+#'                        
+#'   ggplot(data)
 #'
-#'   ggplot(data,
+#'   ggplot(as.data.frame(data),
 #'          aes(x = year)) +
 #'     geom_col(aes(y = value),
 #'              fill = "grey75") +