diff --git a/src/data.rs b/src/data.rs
index 40ede70..17a97b9 100644
--- a/src/data.rs
+++ b/src/data.rs
@@ -50,7 +50,7 @@ impl HostResources {
         self.reserved_vcpus += app.app_resource.vcpu;
         self.reserved_disk_mb += app.app_resource.disk_mb;
 
-        for (_, port) in app.mapped_ports.iter() {
+        for (port, _) in app.mapped_ports.iter() {
             self.reserved_host_ports.insert(*port);
         }
         self.existing_apps.insert(app.uuid.clone());