diff --git a/grpc/health/v1/health.proto b/grpc/health/v1/health.proto
index 4b4677b8..4b36370f 100644
--- a/grpc/health/v1/health.proto
+++ b/grpc/health/v1/health.proto
@@ -40,4 +40,5 @@ message HealthCheckResponse {
 
 service Health {
   rpc Check(HealthCheckRequest) returns (HealthCheckResponse);
+  rpc Watch(HealthCheckRequest) returns (stream HealthCheckResponse);
 }