diff --git a/api/audio/echo_canceller3_config.h b/api/audio/echo_canceller3_config.h
index 6eb91aa845..7b3ced38fd 100644
--- a/api/audio/echo_canceller3_config.h
+++ b/api/audio/echo_canceller3_config.h
@@ -54,6 +54,7 @@ struct EchoCanceller3Config {
 
     size_t config_change_duration_blocks = 250;
     float initial_state_seconds = 2.5f;
+    bool conservative_initial_phase = false;
   } filter;
 
   struct Erle {
diff --git a/modules/audio_processing/aec3/aec_state.cc b/modules/audio_processing/aec3/aec_state.cc
index 09a42bff58..1d5070f2de 100644
--- a/modules/audio_processing/aec3/aec_state.cc
+++ b/modules/audio_processing/aec3/aec_state.cc
@@ -130,10 +130,16 @@ AecState::AecState(const EchoCanceller3Config& config)
       enforce_delay_after_realignment_(EnableEnforcingDelayAfterRealignment()),
       allow_linear_mode_with_diverged_filter_(
           EnableLinearModeWithDivergedFilter()),
-      early_filter_usage_activated_(EnableEarlyFilterUsage()),
-      use_short_initial_state_(EnableShortInitialState()),
-      convergence_trigger_linear_mode_(EnableConvergenceTriggeredLinearMode()),
-      no_alignment_required_for_linear_mode_(EnableNoWaitForAlignment()),
+      early_filter_usage_activated_(EnableEarlyFilterUsage() &&
+                                    !config.filter.conservative_initial_phase),
+      use_short_initial_state_(EnableShortInitialState() &&
+                               !config.filter.conservative_initial_phase),
+      convergence_trigger_linear_mode_(
+          EnableConvergenceTriggeredLinearMode() &&
+          !config.filter.conservative_initial_phase),
+      no_alignment_required_for_linear_mode_(
+          EnableNoWaitForAlignment() &&
+          !config.filter.conservative_initial_phase),
       use_uncertainty_until_sufficiently_adapted_(
           EnableUncertaintyUntilSufficientAdapted()),
       transparent_mode_enforces_nonlinear_mode_(
diff --git a/modules/audio_processing/test/audio_processing_simulator.cc b/modules/audio_processing/test/audio_processing_simulator.cc
index 9a353bd189..160798dd1d 100644
--- a/modules/audio_processing/test/audio_processing_simulator.cc
+++ b/modules/audio_processing/test/audio_processing_simulator.cc
@@ -214,6 +214,8 @@ EchoCanceller3Config ParseAec3Parameters(const std::string& filename) {
               &cfg.filter.config_change_duration_blocks);
     ReadParam(section, "initial_state_seconds",
               &cfg.filter.initial_state_seconds);
+    ReadParam(section, "conservative_initial_phase",
+              &cfg.filter.conservative_initial_phase);
   }
 
   if (rtc::GetValueFromJsonObject(root, "erle", &section)) {