diff --git a/web/templates/about.pug b/web/templates/about.pug
index 7e8e1e7..956ee9d 100755
--- a/web/templates/about.pug
+++ b/web/templates/about.pug
@@ -15,7 +15,7 @@ block nav
     h1 About
 
 mixin isServiceUp(header, service)
-    if (services[service])
+    if v, ok := services[service]; ok && v
         h3.service-up= header
     else
         h3.service-down= header