diff --git a/lib/oga/xml/entities.rb b/lib/oga/xml/entities.rb
index 470036e..66a5615 100644
--- a/lib/oga/xml/entities.rb
+++ b/lib/oga/xml/entities.rb
@@ -72,7 +72,7 @@ module Oga
 
         if input.include?(AMPERSAND)
           input = input.gsub(CODEPOINT_ENTITY) do |match|
-            [$1 ? Integer($2, 16) : Integer($2)].pack('U')
+            [$1 ? Integer($2, 16) : Integer($2, 10)].pack('U*')
           end
         end
 
diff --git a/spec/oga/xml/entities_spec.rb b/spec/oga/xml/entities_spec.rb
index 68bf4d3..11161a1 100644
--- a/spec/oga/xml/entities_spec.rb
+++ b/spec/oga/xml/entities_spec.rb
@@ -69,6 +69,10 @@ describe Oga::XML::Entities do
     it 'decodes &#x3C; into <' do
       described_class.decode('&#x3C;').should == '<'
     end
+
+    it 'decodes numeric entities starting with a 0' do
+      described_class.decode('&#038;').should == '&'
+    end
   end
 
   describe 'encode' do