1 files changed, 1 insertions, 0 deletions
diff --git a/test/ruby/test_io.rb b/test/ruby/test_io.rb
index 58cae7e291..d44dd31e71 100644
--- a/test/ruby/test_io.rb
+++ b/test/ruby/test_io.rb
@@ -2202,6 +2202,7 @@ End
 
   def test_fcntl_lock_linux
     return if /x86_64-linux/ !~ RUBY_PLATFORM # A binary form of struct flock depend on platform
+    return if [nil].pack("p").bytesize != 8 # Return if x32 platform.
 
     pad=0
     Tempfile.create(self.class.name) do |f|