1 files changed, 2 insertions, 0 deletions
diff --git a/app/src/main/java/com/wireguard/config/InetEndpoint.java b/app/src/main/java/com/wireguard/config/InetEndpoint.java
index 06d0ca80..962d97c6 100644
--- a/app/src/main/java/com/wireguard/config/InetEndpoint.java
+++ b/app/src/main/java/com/wireguard/config/InetEndpoint.java
@@ -51,6 +51,8 @@ public final class InetEndpoint {
         } catch (final URISyntaxException e) {
             throw new IllegalArgumentException(e);
         }
+        if (uri.getPort() < 0)
+            throw new IllegalArgumentException("An endpoint must specify a port (e.g. 51820)");
         try {
             InetAddresses.parse(uri.getHost());
             // Parsing ths host as a numeric address worked, so we don't need to do DNS lookups.