mouse hover highlight in flow chooser
diff --git a/web/ons-demo/js/flows.js b/web/ons-demo/js/flows.js
index 6975c29..72bfd2f 100644
--- a/web/ons-demo/js/flows.js
+++ b/web/ons-demo/js/flows.js
@@ -341,6 +341,10 @@
 }
 
 function deselectFlow(flow, ifCreatePending) {
+	if (!flow) {
+		return;
+	}
+
 	var flowKey = makeFlowKey(flow);
 	var newSelectedFlows = [];
 	selectedFlows.forEach(function (flow) {