diff --git a/lib/logger.rb b/lib/logger.rb
index 4000dae..854687c 100644
--- a/lib/logger.rb
+++ b/lib/logger.rb
@@ -410,7 +410,7 @@ def initialize(logdev, shift_age = 0, shift_size = 1048576, level: DEBUG,
   # Reopen a log device.
   #
   def reopen(logdev = nil)
-    @logdev.reopen(logdev)
+    @logdev&.reopen(logdev)
     self
   end
 
diff --git a/test/logger/test_logger.rb b/test/logger/test_logger.rb
index f8cc2e5..4bbfd52 100644
--- a/test/logger/test_logger.rb
+++ b/test/logger/test_logger.rb
@@ -216,6 +216,13 @@ def test_reopen
     assert_equal(STDOUT, logger.instance_variable_get(:@logdev).dev)
   end
 
+  def test_reopen_nil_logdevice
+    logger = Logger.new(File::NULL)
+    assert_nothing_raised do
+      logger.reopen(STDOUT)
+    end
+  end
+
   def test_add
     logger = Logger.new(nil)
     logger.progname = "my_progname"