diff --git a/plugins/ruby/codegen.pl b/plugins/ruby/codegen.pl
index 81ca15137..4f0d04ebe 100755
--- a/plugins/ruby/codegen.pl
+++ b/plugins/ruby/codegen.pl
@@ -65,6 +65,7 @@ sub render_enum_fields {
     push @lines_rb, "$idxname = Hash.new";
 
     my %attr_type;
+    my %attr_list;
     for my $attr ($type->findnodes('child::enum-attr')) {
         my $rbattr = rb_ucase($attr->getAttribute('name'));
         my $typeattr = $attr->getAttribute('type-name');
@@ -80,7 +81,10 @@ sub render_enum_fields {
         }
 
         my $def = $attr->getAttribute('default-value');
-        if ($def) {
+        if ($attr->getAttribute('is-list')) {
+            push @lines_rb, "$rbattr = Hash.new { |h, k| h[k] = [] }";
+            $attr_list{$rbattr} = 1;
+        } elsif ($def) {
             $def = ":$def" if ($attr_type{$rbattr} eq 'symbol');
             $def =~ s/'/\\'/g if ($attr_type{$rbattr} eq 'quote');
             $def = "'$def'" if ($attr_type{$rbattr} eq 'quote');
@@ -101,10 +105,11 @@ sub render_enum_fields {
                 my $ian = $iattr->getAttribute('name');
                 my $iav = $iattr->getAttribute('value');
                 my $rbattr = rb_ucase($ian);
+                my $op = ($attr_list{$rbattr} ? '<<' : '=');
                 $iav = ":$iav" if ($attr_type{$rbattr} eq 'symbol');
                 $iav =~ s/'/\\'/g if ($attr_type{$rbattr} eq 'quote');
                 $iav = "'$iav'" if ($attr_type{$rbattr} eq 'quote');
-                $lines_rb[$#lines_rb] .= " ; ${rbattr}[$value] = $iav";
+                $lines_rb[$#lines_rb] .= " ; ${rbattr}[:$rbelemname] $op $iav";
             }
         }
     }
diff --git a/plugins/ruby/ruby-memstruct.rb b/plugins/ruby/ruby-memstruct.rb
index cf8a54d9e..4393cc76c 100644
--- a/plugins/ruby/ruby-memstruct.rb
+++ b/plugins/ruby/ruby-memstruct.rb
@@ -294,6 +294,12 @@ class PointerAry < MemStruct
 		(DFHack.memory_read_int32(@_memaddr) & 0xffffffff) + delta
 	end
 
+	def _get
+		addr = _getp
+		return if addr == 0
+		self
+	end
+
 	def [](i)
 		addr = _getp(i)
 		return if addr == 0
@@ -305,7 +311,7 @@ class PointerAry < MemStruct
 		@_tg._at(addr)._set(v)
 	end
 
-	def inspect ; "#<PointerAry #{'0x%X' % _getp}>" ; end
+	def inspect ; ptr = _getp ; (ptr == 0) ? 'NULL' : "#<PointerAry #{'0x%X' % ptr}>" ; end
 end
 module IndexEnum
 	def indexenum(idx)