diff --git a/mediapipe/calculators/core/real_time_flow_limiter_calculator.cc b/mediapipe/calculators/core/real_time_flow_limiter_calculator.cc
index ef3cb989..e3c92ba5 100644
--- a/mediapipe/calculators/core/real_time_flow_limiter_calculator.cc
+++ b/mediapipe/calculators/core/real_time_flow_limiter_calculator.cc
@@ -76,7 +76,11 @@ constexpr char kMaxInFlightTag[] = "MAX_IN_FLIGHT";
 //   }
 //   output_stream: "gated_frames"
 // }
-class RealTimeFlowLimiterCalculator : public CalculatorBase {
+//
+// Please use FlowLimiterCalculator, which replaces this calculator and
+// defines a few additional configuration options.
+class ABSL_DEPRECATED("Use FlowLimiterCalculator instead.")
+    RealTimeFlowLimiterCalculator : public CalculatorBase {
  public:
   static absl::Status GetContract(CalculatorContract* cc) {
     int num_data_streams = cc->Inputs().NumEntries("");