4 files changed, 11 insertions, 10 deletions

diff --git a/src/frame.c b/src/frame.c
index ccac18d23c2..dc8045f41e6 100644
--- a/src/frame.c
+++ b/src/frame.c
@@ -1564,6 +1564,13 @@ do_switch_frame (Lisp_Object frame, int track, int for_deletion, Lisp_Object nor
   if (! FRAME_MINIBUF_ONLY_P (XFRAME (selected_frame)))
     last_nonminibuf_frame = XFRAME (selected_frame);
 
+  /* If the selected window in the target frame is its mini-window, we move
+     to a different window, the most recently used one, unless there is a
+     valid active minibuffer in the mini-window.  */
+  if (EQ (f->selected_window, f->minibuffer_window)
+      && NILP (Fminibufferp (XWINDOW (f->minibuffer_window)->contents, Qt)))
+    Fset_frame_selected_window (frame, call1 (Qget_mru_window, frame), Qnil);
+
   Fselect_window (f->selected_window, norecord);
 
   /* We want to make sure that the next event generates a frame-switch
diff --git a/src/frame.h b/src/frame.h
index 0b8cdf62ded..cc0dae8f5ab 100644
--- a/src/frame.h
+++ b/src/frame.h
@@ -123,6 +123,7 @@ struct frame
   /* This frame's selected window.
      Each frame has its own window hierarchy
      and one of the windows in it is selected within the frame.
+     This window may be the mini-window of the frame, if any.
      The selected window of the selected frame is Emacs's selected window.  */
   Lisp_Object selected_window;
 
diff --git a/src/minibuf.c b/src/minibuf.c
index 847e7be5ad4..0fc7f2caa15 100644
--- a/src/minibuf.c
+++ b/src/minibuf.c
@@ -197,20 +197,12 @@ move_minibuffers_onto_frame (struct frame *of, bool for_deletion)
     return;
   if (FRAME_LIVE_P (f)
       && !EQ (f->minibuffer_window, of->minibuffer_window)
-      && WINDOW_LIVE_P (f->minibuffer_window) /* F not a tootip frame */
+      && WINDOW_LIVE_P (f->minibuffer_window) /* F not a tooltip frame */
       && WINDOW_LIVE_P (of->minibuffer_window))
     {
       zip_minibuffer_stacks (f->minibuffer_window, of->minibuffer_window);
       if (for_deletion && XFRAME (MB_frame) != of)
         MB_frame = selected_frame;
-      if (!for_deletion
-          && MINI_WINDOW_P (XWINDOW (FRAME_SELECTED_WINDOW (of))))
-        {
-          Lisp_Object old_frame;
-          XSETFRAME (old_frame, of);
-          Fset_frame_selected_window (old_frame,
-                                      Fframe_first_window (old_frame), Qnil);
-        }
     }
 }
 
diff --git a/src/xdisp.c b/src/xdisp.c
index 6963935666b..9740e6b590e 100644
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -12796,8 +12796,9 @@ gui_consider_frame_title (Lisp_Object frame)
          mode_line_noprop_buf; then display the title.  */
       record_unwind_protect (unwind_format_mode_line,
                              format_mode_line_unwind_data
-                             (NULL, current_buffer, Qnil, false));
+                             (f, current_buffer, selected_window, false));
 
+      Fselect_window (f->selected_window, Qt);
       set_buffer_internal_1
         (XBUFFER (XWINDOW (f->selected_window)->contents));
       fmt = FRAME_ICONIFIED_P (f) ? Vicon_title_format : Vframe_title_format;