|  | @@ -40,11 +40,11 @@ namespace Grpc.HealthCheck
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				|  |  |      public class HealthServiceImpl : Grpc.Health.V1.Health.HealthBase
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				|  |  |      {
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				|  |  |          private readonly object statusLock = new object();
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				|  |  | -        private readonly object watchersLock = new object();
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				|  |  | -
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				|  |  |          private readonly Dictionary<string, HealthCheckResponse.Types.ServingStatus> statusMap =
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				|  |  |              new Dictionary<string, HealthCheckResponse.Types.ServingStatus>();
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				|  |  | +
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				|  |  |  #if GRPC_SUPPORT_WATCH
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				|  |  | +        private readonly object watchersLock = new object();
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				|  |  |          private readonly Dictionary<string, List<ChannelWriter<HealthCheckResponse>>> watchers =
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				|  |  |              new Dictionary<string, List<ChannelWriter<HealthCheckResponse>>>();
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				|  |  |  #endif
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