diff --git a/core/java/android/util/FeatureFlagUtils.java b/core/java/android/util/FeatureFlagUtils.java
index 2d6cbd6cbcefb..fac699ece642a 100644
--- a/core/java/android/util/FeatureFlagUtils.java
+++ b/core/java/android/util/FeatureFlagUtils.java
@@ -50,7 +50,7 @@ public class FeatureFlagUtils {
         DEFAULT_FLAGS.put("settings_slice_injection", "true");
         DEFAULT_FLAGS.put("settings_systemui_theme", "true");
         DEFAULT_FLAGS.put("settings_wifi_mac_randomization", "true");
-        DEFAULT_FLAGS.put("settings_mainline_module", "true");
+        DEFAULT_FLAGS.put("settings_mainline_module", "false");
         DEFAULT_FLAGS.put("settings_dynamic_android", "false");
         DEFAULT_FLAGS.put(SEAMLESS_TRANSFER, "false");
         DEFAULT_FLAGS.put(HEARING_AID_SETTINGS, "false");