How to add a vertical line to a plot from the "mirt" package?

I used the mirt package to create an item information plot.

library(mirt)
model <- mirt(data, 1, itemtype = '2PL')
plot(model, type = 'infotrace', facet_items = FALSE)

I try to add a vertical line to the plot at x = 1. However, the function abline(v = 1) does not work.