diff --git a/setup/functions.sh b/setup/functions.sh
index 3bb96b7a..1dfe55ae 100644
--- a/setup/functions.sh
+++ b/setup/functions.sh
@@ -158,6 +158,17 @@ function message_box {
 	dialog --title "$1" --msgbox "$2" 0 0
 }
 
+function yesno_box {
+	# yesno_box "title" "prompt" VARIABLE
+	# The exit code resembles the user's input and will be stored in the variable VARIABLE
+	# Temporarily turn off 'set -e' because we need the dialog return code
+	declare -n result=$3
+	set +e
+	dialog --stdout --title "$1" --yesno "$2" 0 0
+	result=$?
+	set -e
+}
+
 function input_box {
 	# input_box "title" "prompt" "defaultvalue" VARIABLE
 	# The user's input will be stored in the variable VARIABLE.