1 files changed, 3 insertions, 0 deletions
diff --git a/lib/ipaddr.rb b/lib/ipaddr.rb
index 9cc210c307..51ad081e23 100644
--- a/lib/ipaddr.rb
+++ b/lib/ipaddr.rb
@@ -510,6 +510,9 @@ class IPAddr
     @addr = addr
     if family[0]
       @family = family[0]
+      if @family == Socket::AF_INET
+        @mask_addr &= IN4MASK
+      end
     end
     return self
   end