diff --git a/lib/WebGUI/Operation/Workflow.pm b/lib/WebGUI/Operation/Workflow.pm
index 075d5da0e..3b2e3833a 100644
--- a/lib/WebGUI/Operation/Workflow.pm
+++ b/lib/WebGUI/Operation/Workflow.pm
@@ -157,6 +157,7 @@ sub www_editWorkflow {
 	my $addmenu = '<div style="float: left; width: 200px; font-size: 11px;">';
 	foreach my $class (@{$workflowActivities->{$workflow->get("type")}}) {
 		my $activity = WebGUI::Workflow::Activity->newByPropertyHashRef($session, {className=>$class});
+        next unless defined $activity;
 		$addmenu .= '<a href="'.$session->url->page("op=editWorkflowActivity;className=".$class.";workflowId=".$workflow->getId).'">'.$activity->getName."</a><br />\n";
 	}	
 	$addmenu .= '</div>';