diff --git a/src/testdir/test_window_cmd.vim b/src/testdir/test_window_cmd.vim
index 569a78a..6c9ddc2 100644
--- a/src/testdir/test_window_cmd.vim
+++ b/src/testdir/test_window_cmd.vim
@@ -67,4 +67,16 @@
   augroup! test_window_cmd_wincmd_gf
 endfunc
 
+func Test_next_split_all()
+  " This was causing an illegal memory access.
+  n x
+  norm axxx
+  split
+  split
+  s/x
+  s/x
+  all
+  bwipe!
+endfunc
+
 " vim: shiftwidth=2 sts=2 expandtab
diff --git a/src/version.c b/src/version.c
index 828450d..bb4cadc 100644
--- a/src/version.c
+++ b/src/version.c
@@ -765,6 +765,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    483,
+/**/
     482,
 /**/
     481,
diff --git a/src/window.c b/src/window.c
index 06f97de..d0dff69 100644
--- a/src/window.c
+++ b/src/window.c
@@ -2450,6 +2450,10 @@
 #endif
 	curbuf = curwin->w_buffer;
 	close_curwin = TRUE;
+
+	/* The cursor position may be invalid if the buffer changed after last
+	 * using the window. */
+	check_cursor();
     }
     if (p_ea && (*p_ead == 'b' || *p_ead == dir))
 	win_equal(curwin, TRUE, dir);