diff --git a/lib/gitlab/gitaly_client/repository_service.rb b/lib/gitlab/gitaly_client/repository_service.rb
index b5a734aaef6..6441065f5fe 100644
--- a/lib/gitlab/gitaly_client/repository_service.rb
+++ b/lib/gitlab/gitaly_client/repository_service.rb
@@ -262,6 +262,12 @@ module Gitlab
 
         response.license_short_name.presence
       end
+
+      def calculate_checksum
+        request  = Gitaly::CalculateChecksumRequest.new(repository: @gitaly_repo)
+        response = GitalyClient.call(@storage, :repository_service, :calculate_checksum, request)
+        response.checksum.presence
+      end
     end
   end
 end
diff --git a/spec/lib/gitlab/gitaly_client/repository_service_spec.rb b/spec/lib/gitlab/gitaly_client/repository_service_spec.rb
index 111b1b35fa0..21592688bf0 100644
--- a/spec/lib/gitlab/gitaly_client/repository_service_spec.rb
+++ b/spec/lib/gitlab/gitaly_client/repository_service_spec.rb
@@ -134,4 +134,15 @@ describe Gitlab::GitalyClient::RepositoryService do
       client.squash_in_progress?(squash_id)
     end
   end
+
+  describe '#calculate_checksum' do
+    it 'sends a calculate_checksum message' do
+      expect_any_instance_of(Gitaly::RepositoryService::Stub)
+        .to receive(:calculate_checksum)
+        .with(gitaly_request_with_path(storage_name, relative_path), kind_of(Hash))
+        .and_return(double(checksum: 0))
+
+      client.calculate_checksum
+    end
+  end
 end