diff --git a/src/testdir/test_put.vim b/src/testdir/test_put.vim
index a6bed75..921d3b2 100644
--- a/src/testdir/test_put.vim
+++ b/src/testdir/test_put.vim
@@ -152,6 +152,10 @@
   " FIXME: should actually check if sizeof(int) == sizeof(long)
   CheckNotMSWindows
 
+  if v:numbersize != 64
+    throw 'Skipped: only works with 64 bit numbers'
+  endif
+
   new
   let @" = 'x'
   call assert_fails('norm 44444444444444p', 'E1240:')