diff --git a/lib/friendly_id/base.rb b/lib/friendly_id/base.rb
index b0b70561a..5e10762f3 100644
--- a/lib/friendly_id/base.rb
+++ b/lib/friendly_id/base.rb
@@ -246,5 +246,10 @@ def to_param
         friendly_id.presence.to_param || super
       end
     end
+
+    # Clears slug on duplicate records when calling `dup`.
+    def dup
+      super.tap { |duplicate| duplicate.slug = nil }
+    end
   end
 end
diff --git a/test/shared.rb b/test/shared.rb
index 7c0e7c7a9..fce22ac44 100644
--- a/test/shared.rb
+++ b/test/shared.rb
@@ -51,6 +51,13 @@ module Slugged
           end
         end
 
+        test "should set the slug to nil on dup" do
+          with_instance_of model_class do |record|
+            record2 = record.dup
+            assert_nil record2.slug
+          end
+        end
+
         test "when validations block save, to_param should return friendly_id rather than nil" do
           my_model_class = Class.new(model_class)
           self.class.const_set("Foo", my_model_class)