1 files changed, 5 insertions, 0 deletions
diff --git a/ext/dl/test/test_import.rb b/ext/dl/test/test_import.rb
index ced2ac8dd7..14fb1eba65 100644
--- a/ext/dl/test/test_import.rb
+++ b/ext/dl/test/test_import.rb
@@ -40,6 +40,11 @@ module DL
   end
 
   class TestImport < TestBase
+    def test_sizeof()
+      assert_equal(DL::SIZEOF_VOIDP, LIBC.sizeof("FILE*"))
+      assert_equal(LIBC::MyStruct.size(), LIBC.sizeof(LIBC::MyStruct))
+    end
+
     def test_unsigned_result()
       d = (2 ** 31) + 1