diff --git a/src/structs.h b/src/structs.h
index a743a4f..893b826 100644
--- a/src/structs.h
+++ b/src/structs.h
@@ -1555,11 +1555,13 @@
 typedef struct tabpage_S tabpage_T;
 struct tabpage_S
 {
-    tabpage_T	    *tp_next;	/* next tabpage or NULL */
-    frame_T	    *tp_topframe;
-    win_T	    *tp_curwin;	/* current window in this Tab page */
-    win_T	    *tp_firstwin; /* first window in this Tab page */
-    win_T	    *tp_lastwin;  /* last window in this Tab page */
+    tabpage_T	    *tp_next;	    /* next tabpage or NULL */
+    frame_T	    *tp_topframe;   /* topframe for the windows */
+    win_T	    *tp_curwin;	    /* current window in this Tab page */
+    win_T	    *tp_firstwin;   /* first window in this Tab page */
+    win_T	    *tp_lastwin;    /* last window in this Tab page */
+    long	    tp_old_Rows;    /* Rows when Tab page was left */
+    long	    tp_old_Columns; /* Columns when Tab page was left */
 };
 
 /*