diff --git a/src/Hydra/lib/Hydra/Controller/Root.pm b/src/Hydra/lib/Hydra/Controller/Root.pm
index 159dc770..1a57db52 100644
--- a/src/Hydra/lib/Hydra/Controller/Root.pm
+++ b/src/Hydra/lib/Hydra/Controller/Root.pm
@@ -300,7 +300,7 @@ sub updateReleaseSet {
             { job => $name
             , description => $description
             , attrs => $attrs
-            , isprimary => $c->request->params->{"primary"} eq $baseName
+            , isprimary => $c->request->params->{"primary"} eq $baseName ? 1 : 0
             });
     }