diff --git a/R/cloze.R b/R/cloze.R
index fa68ce2..0a0c7fc 100644
--- a/R/cloze.R
+++ b/R/cloze.R
@@ -60,7 +60,7 @@
 #' cloze(42) # Numerical
 #' cloze("Australia") # Short answer
 #' cloze("rep_len", c("rep", "rep.int", "rep_len", "replicate")) # Single choice
-#' cloze(c("A", "B", "C"), letters) # Multiple choice
+#' cloze(c("A", "B", "C"), LETTERS) # Multiple choice
 #'
 #' @name cloze_questions
 NULL
diff --git a/man/cloze_questions.Rd b/man/cloze_questions.Rd
index 17c89a1..9ce27d6 100644
--- a/man/cloze_questions.Rd
+++ b/man/cloze_questions.Rd
@@ -108,6 +108,6 @@ cloze_numerical(
 cloze(42) # Numerical
 cloze("Australia") # Short answer
 cloze("rep_len", c("rep", "rep.int", "rep_len", "replicate")) # Single choice
-cloze(c("A", "B", "C"), letters) # Multiple choice
+cloze(c("A", "B", "C"), LETTERS) # Multiple choice
 
 }