diff --git a/ext/dl/handle.c b/ext/dl/handle.c
index 28be36c099..f5e7a33f7e 100644
--- a/ext/dl/handle.c
+++ b/ext/dl/handle.c
@@ -51,6 +51,12 @@ static const rb_data_type_t dlhandle_data_type = {
     0, dlhandle_free, dlhandle_memsize,
 };
 
+/*
+ * call-seq: close
+ *
+ * Close this DL::Handle.  Calling close more than once will raise a
+ * DL::DLError exception.
+ */
 VALUE
 rb_dlhandle_close(VALUE self)
 {
diff --git a/test/dl/test_handle.rb b/test/dl/test_handle.rb
index 487b8d1a34..f2b1de3c20 100644
--- a/test/dl/test_handle.rb
+++ b/test/dl/test_handle.rb
@@ -122,5 +122,15 @@ module DL
       handle.disable_close
       assert !handle.close_enabled?, 'close is enabled'
     end
+
+    def test_NEXT
+      handle = DL::Handle::NEXT
+      assert handle['malloc']
+    end
+
+    def test_DEFAULT
+      handle = DL::Handle::DEFAULT
+      assert handle['malloc']
+    end
   end
 end