diff --git a/tools/aconfig/aconfig_storage_read_api/srcs/android/os/flagging/PlatformAconfigPackage.java b/tools/aconfig/aconfig_storage_read_api/srcs/android/os/flagging/PlatformAconfigPackage.java
index ddad249..63baf9e 100644
--- a/tools/aconfig/aconfig_storage_read_api/srcs/android/os/flagging/PlatformAconfigPackage.java
+++ b/tools/aconfig/aconfig_storage_read_api/srcs/android/os/flagging/PlatformAconfigPackage.java
@@ -65,7 +65,11 @@
     /** @hide */
     @UnsupportedAppUsage
     public static final Set<String> PLATFORM_PACKAGE_MAP_FILES =
-            Set.of("system.package.map", "vendor.package.map", "product.package.map");
+            Set.of(
+                    "system.package.map",
+                    "system_ext.package.map",
+                    "vendor.package.map",
+                    "product.package.map");
 
     static {
         for (String pf : PLATFORM_PACKAGE_MAP_FILES) {
diff --git a/tools/aconfig/aconfig_storage_read_api/tests/functional/srcs/PlatformAconfigPackageInternalTest.java b/tools/aconfig/aconfig_storage_read_api/tests/functional/srcs/PlatformAconfigPackageInternalTest.java
index 9896baf..0c5bc1c 100644
--- a/tools/aconfig/aconfig_storage_read_api/tests/functional/srcs/PlatformAconfigPackageInternalTest.java
+++ b/tools/aconfig/aconfig_storage_read_api/tests/functional/srcs/PlatformAconfigPackageInternalTest.java
@@ -42,7 +42,8 @@
 @RunWith(JUnit4.class)
 public class PlatformAconfigPackageInternalTest {
 
-    private static final Set<String> PLATFORM_CONTAINERS = Set.of("system", "vendor", "product");
+    private static final Set<String> PLATFORM_CONTAINERS =
+            Set.of("system", "system_ext", "vendor", "product");
 
     @Test
     public void testPlatformAconfigPackageInternal_load() throws IOException {
diff --git a/tools/aconfig/aconfig_storage_read_api/tests/functional/srcs/PlatformAconfigPackageTest.java b/tools/aconfig/aconfig_storage_read_api/tests/functional/srcs/PlatformAconfigPackageTest.java
index 1c6c238..2b4ead8 100644
--- a/tools/aconfig/aconfig_storage_read_api/tests/functional/srcs/PlatformAconfigPackageTest.java
+++ b/tools/aconfig/aconfig_storage_read_api/tests/functional/srcs/PlatformAconfigPackageTest.java
@@ -42,7 +42,8 @@
 @RunWith(JUnit4.class)
 public class PlatformAconfigPackageTest {
 
-    private static final Set<String> PLATFORM_CONTAINERS = Set.of("system", "vendor", "product");
+    private static final Set<String> PLATFORM_CONTAINERS =
+            Set.of("system", "system_ext", "vendor", "product");
 
     @Test
     public void testPlatformAconfigPackage_StorageFilesCache() throws IOException {
diff --git a/tools/aconfig/fake_device_config/src/android/os/flagging/PlatformAconfigPackage.java b/tools/aconfig/fake_device_config/src/android/os/flagging/PlatformAconfigPackage.java
index ec79f7d..c06a532 100644
--- a/tools/aconfig/fake_device_config/src/android/os/flagging/PlatformAconfigPackage.java
+++ b/tools/aconfig/fake_device_config/src/android/os/flagging/PlatformAconfigPackage.java
@@ -24,7 +24,11 @@
 public class PlatformAconfigPackage {
 
     public static final Set<String> PLATFORM_PACKAGE_MAP_FILES =
-            Set.of("system.package.map", "vendor.package.map", "product.package.map");
+            Set.of(
+                    "system.package.map",
+                    "system_ext.package.map",
+                    "vendor.package.map",
+                    "product.package.map");
 
     public static PlatformAconfigPackage load(String packageName) {
         throw new UnsupportedOperationException("Stub!");