diff --git a/R/input-switch.R b/R/input-switch.R
index d85ecdc46..2567fea8e 100644
--- a/R/input-switch.R
+++ b/R/input-switch.R
@@ -64,7 +64,7 @@ toggle_switch <- function(id, value = NULL, session = get_current_session()) {
     abort("`value` must be a `NULL` or a single logical value.")
   }
 
-  if (!rlang::is_string(id, n = 1)) {
+  if (!rlang::is_string(id)) {
     abort("`id` must be a single string containing the `id` of a switch input.")
   }