diff --git a/modules/audio_processing/agc2/rnn_vad/lp_residual.cc b/modules/audio_processing/agc2/rnn_vad/lp_residual.cc
index dd9212f838..e62bcc425c 100644
--- a/modules/audio_processing/agc2/rnn_vad/lp_residual.cc
+++ b/modules/audio_processing/agc2/rnn_vad/lp_residual.cc
@@ -40,9 +40,13 @@ void DenoiseAutoCorrelation(
     rtc::ArrayView<float, kNumLpcCoefficients> auto_corr) {
   // Assume -40 dB white noise floor.
   auto_corr[0] *= 1.0001f;
-  for (size_t i = 1; i < kNumLpcCoefficients; ++i) {
-    auto_corr[i] -= auto_corr[i] * (0.008f * i) * (0.008f * i);
-  }
+  // Hard-coded values obtained as
+  // [np.float32((0.008*0.008*i*i)) for i in range(1,5)].
+  auto_corr[1] -= auto_corr[1] * 0.000064f;
+  auto_corr[2] -= auto_corr[2] * 0.000256f;
+  auto_corr[3] -= auto_corr[3] * 0.000576f;
+  auto_corr[4] -= auto_corr[4] * 0.001024f;
+  static_assert(kNumLpcCoefficients == 5, "Update `auto_corr`.");
 }
 
 // Computes the initial inverse filter coefficients given the auto-correlation