diff --git a/get-hosts.sh b/get-hosts.sh
index bb58ee0..deef9ff 100755
--- a/get-hosts.sh
+++ b/get-hosts.sh
@@ -60,6 +60,11 @@ hosts=$(echo "$hosts" | grep '\.\|:')
 # Remove explicitly excluded hosts.
 hosts=$(echo "$hosts" | grep -vxEf excluded-hosts)
 
+if ! echo "$hosts" | grep -qE '\.onion(:.*)?$'; then
+  >&2 echo "The .onions are missing!"
+  exit 1
+fi
+
 if [ -z "$hosts" ]; then
   >&2 echo "hosts file downloads failed."
   exit 1