diff -Npur fcitx-4.2.8.3/src/frontend/gtk2/fcitximcontext-gio.c fcitx-4.2.8.3-new/src/frontend/gtk2/fcitximcontext-gio.c
--- fcitx-4.2.8.3/src/frontend/gtk2/fcitximcontext-gio.c	2013-09-28 16:33:14.000000000 +0800
+++ fcitx-4.2.8.3-new/src/frontend/gtk2/fcitximcontext-gio.c	2014-05-07 04:55:07.227490523 +0800
@@ -971,7 +971,14 @@ _fcitx_im_context_set_capacity(FcitxIMCo
             if (GTK_IS_ENTRY (widget) &&
                     !gtk_entry_get_visibility (GTK_ENTRY (widget))) {
                 flags |= CAPACITY_PASSWORD;
-            }
+            } else {
+#if GTK_CHECK_VERSION(3, 6, 0)
+            GtkInputPurpose purpose;
+            g_object_get(fcitxcontext, "input-purpose", &purpose, NULL);
+            if (purpose == GTK_INPUT_PURPOSE_PASSWORD)
+                flags |= CAPACITY_PASSWORD;
+#endif
+            }  
         }
 
         gboolean update = FALSE;