diff --git a/src/window.c b/src/window.c
index e1781d3..5671cf9 100644
--- a/src/window.c
+++ b/src/window.c
@@ -7236,4 +7236,53 @@
 		list_append_number(list, wp->w_id);
 }
 
+/*
+ * Get the layout of the given tab page for winlayout().
+ */
+    void
+get_framelayout(frame_T *fr, list_T *l, int outer)
+{
+    frame_T	*child;
+    list_T	*fr_list;
+    list_T	*win_list;
+
+    if (fr == NULL)
+	return;
+
+    if (outer)
+	// outermost call from f_winlayout()
+	fr_list = l;
+    else
+    {
+	fr_list = list_alloc();
+	if (fr_list == NULL)
+	    return;
+	list_append_list(l, fr_list);
+    }
+
+    if (fr->fr_layout == FR_LEAF)
+    {
+	if (fr->fr_win != NULL)
+	{
+	    list_append_string(fr_list, (char_u *)"leaf", -1);
+	    list_append_number(fr_list, fr->fr_win->w_id);
+	}
+    }
+    else
+    {
+	list_append_string(fr_list,
+	     fr->fr_layout == FR_ROW ?  (char_u *)"row" : (char_u *)"col", -1);
+
+	win_list = list_alloc();
+	if (win_list == NULL)
+	    return;
+	list_append_list(fr_list, win_list);
+	child = fr->fr_child;
+	while (child != NULL)
+	{
+	    get_framelayout(child, win_list, FALSE);
+	    child = child->fr_next;
+	}
+    }
+}
 #endif