diff --git a/tools/aconfig/aconfig_device_paths/Android.bp b/tools/aconfig/aconfig_device_paths/Android.bp
index dda7a55..bdf96ed 100644
--- a/tools/aconfig/aconfig_device_paths/Android.bp
+++ b/tools/aconfig/aconfig_device_paths/Android.bp
@@ -61,8 +61,12 @@
     name: "libaconfig_java_host_device_paths_src",
     srcs: ["src/HostDeviceProtosTemplate.java"],
     out: ["HostDeviceProtos.java"],
-    tool_files: ["partition_aconfig_flags_paths.txt"],
-    cmd: "sed -e '/TEMPLATE/{r$(location partition_aconfig_flags_paths.txt)' -e 'd}' $(in) > $(out)",
+    tool_files: [
+        "partition_aconfig_flags_paths.txt",
+        "mainline_aconfig_flags_paths.txt",
+    ],
+    cmd: "sed -e '/TEMPLATE/{r$(location partition_aconfig_flags_paths.txt)' -e 'd}' $(in) > $(out).tmp && " +
+    "sed -e '/MAINLINE_T/{r$(location mainline_aconfig_flags_paths.txt)' -e 'd}' $(out).tmp > $(out)",
 }
 
 java_library_host {
diff --git a/tools/aconfig/aconfig_device_paths/mainline_aconfig_flags_paths.txt b/tools/aconfig/aconfig_device_paths/mainline_aconfig_flags_paths.txt
new file mode 100644
index 0000000..af73a84
--- /dev/null
+++ b/tools/aconfig/aconfig_device_paths/mainline_aconfig_flags_paths.txt
@@ -0,0 +1,20 @@
+"/apex/com.android.adservices/etc/aconfig_flags.pb",
+"/apex/com.android.appsearch/etc/aconfig_flags.pb",
+"/apex/com.android.art/etc/aconfig_flags.pb",
+"/apex/com.android.btservices/etc/aconfig_flags.pb",
+"/apex/com.android.cellbroadcast/etc/aconfig_flags.pb",
+"/apex/com.android.configinfrastructure/etc/aconfig_flags.pb",
+"/apex/com.android.conscrypt/etc/aconfig_flags.pb",
+"/apex/com.android.devicelock/etc/aconfig_flags.pb",
+"/apex/com.android.healthfitness/etc/aconfig_flags.pb",
+"/apex/com.android.ipsec/etc/aconfig_flags.pb",
+"/apex/com.android.media/etc/aconfig_flags.pb",
+"/apex/com.android.mediaprovider/etc/aconfig_flags.pb",
+"/apex/com.android.ondevicepersonalization/etc/aconfig_flags.pb",
+"/apex/com.android.os.statsd/etc/aconfig_flags.pb",
+"/apex/com.android.permission/etc/aconfig_flags.pb",
+"/apex/com.android.profiling/etc/aconfig_flags.pb",
+"/apex/com.android.tethering/etc/aconfig_flags.pb",
+"/apex/com.android.uwb/etc/aconfig_flags.pb",
+"/apex/com.android.virt/etc/aconfig_flags.pb",
+"/apex/com.android.wifi/etc/aconfig_flags.pb",
diff --git a/tools/aconfig/aconfig_device_paths/src/HostDeviceProtosTemplate.java b/tools/aconfig/aconfig_device_paths/src/HostDeviceProtosTemplate.java
index e2ad40a..e7d0a76 100644
--- a/tools/aconfig/aconfig_device_paths/src/HostDeviceProtosTemplate.java
+++ b/tools/aconfig/aconfig_device_paths/src/HostDeviceProtosTemplate.java
@@ -40,6 +40,10 @@
         TEMPLATE
     };
 
+    static final String[] MAINLINE_PATHS = {
+        MAINLINE_T
+    };
+
     private static final String APEX_DIR = "/apex";
     private static final String RECURSIVELY_LIST_APEX_DIR_COMMAND =
         "shell su 0 find /apex | grep aconfig_flags";
@@ -55,7 +59,8 @@
         String adbCommandOutput = adbCommandExecutor.executeAdbCommand(
             RECURSIVELY_LIST_APEX_DIR_COMMAND);
 
-        if (adbCommandOutput == null) {
+        if (adbCommandOutput == null || adbCommandOutput.isEmpty()) {
+            paths.addAll(Arrays.asList(MAINLINE_PATHS));
             return paths;
         }