diff --git a/lib/puppet/provider/network_config/redhat.rb b/lib/puppet/provider/network_config/redhat.rb
index 16b00be5..6a0428c4 100644
--- a/lib/puppet/provider/network_config/redhat.rb
+++ b/lib/puppet/provider/network_config/redhat.rb
@@ -228,6 +228,6 @@ def self.unmunge(props)
   end
 
   def self.post_flush_hook(filename)
-    File.chmod(0644, filename)
+    File.chmod(0o644, filename)
   end
 end
diff --git a/spec/unit/provider/network_config/redhat_spec.rb b/spec/unit/provider/network_config/redhat_spec.rb
index 199a9c53..06cefa4d 100644
--- a/spec/unit/provider/network_config/redhat_spec.rb
+++ b/spec/unit/provider/network_config/redhat_spec.rb
@@ -492,7 +492,7 @@ def fixture_data(file)
 
   describe 'when flushing a dirty file' do
     it do
-      File.expects(:chmod).with(0644, '/not/a/real/file')
+      File.expects(:chmod).with(0o644, '/not/a/real/file')
       File.expects(:unlink).never
       described_class.stubs(:perform_write)
       described_class.dirty_file!('/not/a/real/file')