diff -Nur xfce4-timer-plugin-1.6.0/src/xfcetimer.c xfce4-timer-plugin-1.6.0.orig/src/xfcetimer.c
--- xfce4-timer-plugin-1.6.0/src/xfcetimer.c	2015-03-29 07:53:22.426521717 -0600
+++ xfce4-timer-plugin-1.6.0.orig/src/xfcetimer.c	2015-03-29 07:51:50.913218434 -0600
@@ -192,7 +192,7 @@
 
     dialog = gtk_message_dialog_new (NULL, GTK_DIALOG_MODAL,
                                     GTK_MESSAGE_WARNING,
-                                    GTK_BUTTONS_NONE, dialog_message);
+                                    GTK_BUTTONS_NONE, "%s", dialog_message);
                            
     gtk_window_set_title ((GtkWindow *) dialog, dialog_title);