diff --git a/anyterm-cmd b/anyterm-cmd
index c511d68..b7c916e 100644
--- a/anyterm-cmd
+++ b/anyterm-cmd
@@ -8,6 +8,10 @@ set -eo pipefail
 while : ; do
     echo -n "Username: "
     read U
+    if [[ -z "$U" ]]; then
+	echo "Disconnecting."
+	exit
+    fi
     # Make sure it does not start with a "-" and only contains valid
     # username characters.
     if [[ "$U" =~ ^[A-Za-z0-9_][A-Za-z0-9_-]*$ ]]; then