diff --git a/lib/taskjuggler/daemon/ReportServlet.rb b/lib/taskjuggler/daemon/ReportServlet.rb
index d091bd6c..db224783 100644
--- a/lib/taskjuggler/daemon/ReportServlet.rb
+++ b/lib/taskjuggler/daemon/ReportServlet.rb
@@ -172,7 +172,7 @@ def generateWelcomePage(projectId)
               "Cannot get project list from daemon: #{$!}")
       end
 
-      text = "== Welcome to the TaskJuggler Project Server ==\n----\n"
+      text = +"== Welcome to the TaskJuggler Project Server ==\n----\n"
       projects.each do |id|
         if id == projectId
           # Show the list of reports for this project.