diff --git a/lib/logstash/event.rb b/lib/logstash/event.rb
index 9e54c6a2f..cd69b7a0f 100644
--- a/lib/logstash/event.rb
+++ b/lib/logstash/event.rb
@@ -85,7 +85,7 @@ class LogStash::Event
     copy = {}
     @data.each do |k,v|
       # TODO(sissel): Recurse if this is a hash/array?
-      copy[k] = v.clone
+      copy[k] = begin v.clone rescue v end
     end
     return self.class.new(copy)
   end # def clone
diff --git a/spec/filters/clone.rb b/spec/filters/clone.rb
index 83152f52c..fd73f178f 100644
--- a/spec/filters/clone.rb
+++ b/spec/filters/clone.rb
@@ -64,4 +64,20 @@ describe LogStash::Filters::Clone do
 
     end
   end
+
+  describe "Bug LOGSTASH-1225" do
+    ### LOGSTASH-1225: Cannot clone events containing numbers.
+    config <<-CONFIG
+      filter {
+        clone {
+          clones => [ 'clone1' ]
+        }
+      }
+    CONFIG
+
+    sample("type" => "bug-1225", "message" => "unused", "number" => 5) do
+      insist { subject[0]["number"] } == 5
+      insist { subject[1]["number"] } == 5
+    end
+  end
 end