diff --git a/core/installer/derived.go b/core/installer/derived.go
index 6c1305c..ada4e95 100644
--- a/core/installer/derived.go
+++ b/core/installer/derived.go
@@ -218,6 +218,9 @@
 		v, ok := derived[k]
 		// TODO(gio): if missing use default value
 		if !ok {
+			if def.Kind() == KindCluster {
+				ret[k] = "default"
+			}
 			continue
 		}
 		switch def.Kind() {
diff --git a/core/installer/welcome/appmanager-tmpl/app.html b/core/installer/welcome/appmanager-tmpl/app.html
index c1387ad..2629ccf 100644
--- a/core/installer/welcome/appmanager-tmpl/app.html
+++ b/core/installer/welcome/appmanager-tmpl/app.html
@@ -31,6 +31,9 @@
           {{ $schema.Name }}
 		  <details class="dropdown">
 			  {{ $selectedCluster := index $data $name }}
+			  {{ if not $selectedCluster }}
+ 			    {{ $selectedCluster = "default" }}
+			  {{ end }}
 			  <summary id="{{ $name }}">{{ $selectedCluster }}</summary>
 			  <ul>
 				  {{ range $clusters }}