diff --git a/src/db/db/dbLayout.cc b/src/db/db/dbLayout.cc
index ab60ae787..c3505b24b 100644
--- a/src/db/db/dbLayout.cc
+++ b/src/db/db/dbLayout.cc
@@ -531,6 +531,8 @@ Layout::operator= (const Layout &d)
 
     m_tech_name = d.m_tech_name;
 
+    m_prop_id = d.m_prop_id;
+
   }
   return *this;
 }
diff --git a/src/doc/doc/about/packages.xml b/src/doc/doc/about/packages.xml
index ad3bfe060..28dbc6689 100644
--- a/src/doc/doc/about/packages.xml
+++ b/src/doc/doc/about/packages.xml
@@ -138,7 +138,7 @@
   this can be a web server or a folder on 
   a file server. KLayout talks WebDAV, so the web server needs to offer WebDAV 
   access. A subversion (SVN) server provides WebDAV by default, so this is a good
-  choice. For the packages themselves Git or WebDAV/Subversion can be used. You
+  choice. For the packages themselves, Git or WebDAV/Subversion can be used. You
   need to specify the protocol in the package URL (see below).
   </p>
 
diff --git a/testdata/ruby/dbLayoutTests1.rb b/testdata/ruby/dbLayoutTests1.rb
index 284e1fea4..a9d084beb 100644
--- a/testdata/ruby/dbLayoutTests1.rb
+++ b/testdata/ruby/dbLayoutTests1.rb
@@ -2082,6 +2082,24 @@ class DBLayoutTests1_TestClass < TestBase
 
   end
 
+  def test_24
+
+    ly = RBA::Layout::new
+    ly.set_property("k1", 17)
+    ly.set_property(17, "42")
+
+    assert_equal(17, ly.property("k1"))
+    assert_equal("42", ly.property(17))
+    assert_equal(nil, ly.property(42))
+
+    ly_dup = ly.dup
+
+    assert_equal(17, ly_dup.property("k1"))
+    assert_equal("42", ly_dup.property(17))
+    assert_equal(nil, ly_dup.property(42))
+
+  end
+
   # Iterating while flatten
   def test_issue200