diff --git a/R/shiny-ui-base.R b/R/shiny-ui-base.R
index 37ac4e552de5f278384cec4c0807ffed0efc8cf4..a7ad77f8292fb765cfea82dcd4155ca4e77f3617 100644
--- a/R/shiny-ui-base.R
+++ b/R/shiny-ui-base.R
@@ -21,6 +21,7 @@ obsrv <- shiny::observe
 obsrv_e <- shiny::observeEvent
 vols <- shinyFiles::getVolumes
 vol_f <- vols()
+volumes <- shinyFiles::getVolumes()
 validate1 <- function(expr,msg) shiny::validate(need(expr,msg))