diff --git a/lib/ipaddr.rb b/lib/ipaddr.rb
index 5df798f..7892e5e 100644
--- a/lib/ipaddr.rb
+++ b/lib/ipaddr.rb
@@ -499,6 +499,7 @@ def set(addr, *family)
       if addr < 0 || addr > IN4MASK
         raise InvalidAddressError, "invalid address: #{@addr}"
       end
+      @mask_addr &= IN4MASK
     when Socket::AF_INET6
       if addr < 0 || addr > IN6MASK
         raise InvalidAddressError, "invalid address: #{@addr}"
diff --git a/test/test_ipaddr.rb b/test/test_ipaddr.rb
index 2afe749..bd16328 100644
--- a/test/test_ipaddr.rb
+++ b/test/test_ipaddr.rb
@@ -360,6 +360,11 @@ def test_include?
 
   end
 
+  def test_native_coerce_mask_addr
+    assert_equal(IPAddr.new("0.0.0.2/255.255.255.255"), IPAddr.new("::2").native)
+    assert_equal(IPAddr.new("0.0.0.2/255.255.255.255").to_range, IPAddr.new("::2").native.to_range)
+  end
+
   def test_loopback?
     assert_equal(true,  IPAddr.new('127.0.0.1').loopback?)
     assert_equal(true,  IPAddr.new('127.127.1.1').loopback?)