diff --git a/pungi-build.conf.j2 b/pungi-build.conf.j2
index 4a12da9..c5b7da5 100644
--- a/pungi-build.conf.j2
+++ b/pungi-build.conf.j2
@@ -120,7 +120,7 @@ lorax_options = [
             "noupgrade": False,
             "rootfs_size": 3,
             "version": "{{ full_version }}",
-            "isfinal": {% False if beta_suffix is defined and beta_suffix else True %},
+            "isfinal": {% if beta_suffix is defined and beta_suffix %}False{% else %}True{% endif %},
         }
     })
 ]