diff --git a/src/lib/Hydra/Plugin/EmailNotification.pm b/src/lib/Hydra/Plugin/EmailNotification.pm
index 721365e1..6546dd1c 100644
--- a/src/lib/Hydra/Plugin/EmailNotification.pm
+++ b/src/lib/Hydra/Plugin/EmailNotification.pm
@@ -12,7 +12,7 @@ use Hydra::Helper::Email;
 
 sub isEnabled {
     my ($self) = @_;
-    return $self->{config}->{email_notification} == 1;
+    return defined($self->{config}->{email_notification}) && $self->{config}->{email_notification} == 1;
 }
 
 my $template = <<EOF;