diff --git a/src/testdir/test_indent.vim b/src/testdir/test_indent.vim
index 217a7ae..a7e9f42 100644
--- a/src/testdir/test_indent.vim
+++ b/src/testdir/test_indent.vim
@@ -286,4 +286,18 @@
   close!
 endfunc
 
+func Test_indent_overflow_count2()
+  new
+  " this only works, when long is 64bits
+  try
+    setl sw=0x180000000
+  catch /^Vim\%((\a\+)\)\=:E487:/
+  throw 'Skipped: value negative on this platform'
+  endtry
+  call setline(1, "\tabc")
+  norm! <<
+  call assert_equal(0, indent(1))
+  close!
+endfunc
+
 " vim: shiftwidth=2 sts=2 expandtab