diff --git a/os_apply_config/apply_config.py b/os_apply_config/apply_config.py
index fa609ea..b99ebe6 100755
--- a/os_apply_config/apply_config.py
+++ b/os_apply_config/apply_config.py
@@ -158,6 +158,8 @@ def print_key(
     for key in keys:
         try:
             config = config[key]
+            if config is None:
+                raise TypeError()
         except (KeyError, TypeError):
             if default is not None:
                 print(str(default))
diff --git a/os_apply_config/tests/test_apply_config.py b/os_apply_config/tests/test_apply_config.py
index 16319b5..45efa43 100644
--- a/os_apply_config/tests/test_apply_config.py
+++ b/os_apply_config/tests/test_apply_config.py
@@ -39,6 +39,7 @@ TEMPLATE_PATHS = [
 CONFIG = {
     "x": "foo",
     "y": False,
+    "z": None,
     "database": {
         "url": "sqlite:///blah"
     }
@@ -114,6 +115,14 @@ class TestRunOSConfigApplier(testtools.TestCase):
                          self.stdout.read().strip())
         self.assertEqual('', self.logger.output)
 
+    def test_print_null_key(self):
+        self.assertEqual(0, apply_config.main(
+            ['os-apply-config.py', '--metadata', self.path, '--key',
+             'z', '--type', 'raw', '--key-default', '']))
+        self.stdout.seek(0)
+        self.assertEqual('', self.stdout.read().strip())
+        self.assertEqual('', self.logger.output)
+
     def test_print_key_missing(self):
         self.assertEqual(1, apply_config.main(
             ['os-apply-config.py', '--metadata', self.path, '--key',