diff --git a/lib/bugsnag/meta_data.rb b/lib/bugsnag/meta_data.rb
index f4584df0f..51fcb01ac 100644
--- a/lib/bugsnag/meta_data.rb
+++ b/lib/bugsnag/meta_data.rb
@@ -3,5 +3,6 @@ module MetaData
     attr_accessor :bugsnag_meta_data
     attr_accessor :bugsnag_user_id
     attr_accessor :bugsnag_context
+    attr_accessor :bugsnag_grouping_hash
   end
 end
diff --git a/lib/bugsnag/notification.rb b/lib/bugsnag/notification.rb
index 3fa4762c3..76a44ed86 100644
--- a/lib/bugsnag/notification.rb
+++ b/lib/bugsnag/notification.rb
@@ -198,6 +198,9 @@ def deliver
           if exception.bugsnag_context.is_a?(String)
             self.context = exception.bugsnag_context
           end
+          if exception.bugsnag_grouping_hash.is_a?(String)
+            self.grouping_hash = exception.bugsnag_grouping_hash
+          end
         end
       end
 
diff --git a/spec/notification_spec.rb b/spec/notification_spec.rb
index 3cc964a83..5b50ca18e 100644
--- a/spec/notification_spec.rb
+++ b/spec/notification_spec.rb
@@ -223,6 +223,18 @@ def gloops
     }
   end
 
+  it "accepts grouping_hash from an exception that mixes in Bugsnag::MetaData" do
+    exception = BugsnagTestExceptionWithMetaData.new("It crashed")
+    exception.bugsnag_grouping_hash = "exception_hash"
+
+    Bugsnag.notify(exception)
+
+    expect(Bugsnag).to have_sent_notification{ |payload|
+      event = get_event_from_payload(payload)
+      expect(event["groupingHash"]).to eq("exception_hash")
+    }
+  end
+
   it "accept contexts from an exception that mixes in Bugsnag::MetaData, but override using the overrides" do
 
     exception = BugsnagTestExceptionWithMetaData.new("It crashed")