diff --git a/libs/bufferstreams/Android.bp b/libs/bufferstreams/Android.bp
index 365fc45..6c2a980 100644
--- a/libs/bufferstreams/Android.bp
+++ b/libs/bufferstreams/Android.bp
@@ -19,6 +19,7 @@
 aconfig_declarations {
     name: "bufferstreams_flags",
     package: "com.android.graphics.bufferstreams.flags",
+    container: "system",
     srcs: [
         "aconfig/bufferstreams_flags.aconfig",
     ],
diff --git a/libs/bufferstreams/aconfig/bufferstreams_flags.aconfig b/libs/bufferstreams/aconfig/bufferstreams_flags.aconfig
index e258725..d0f7812 100644
--- a/libs/bufferstreams/aconfig/bufferstreams_flags.aconfig
+++ b/libs/bufferstreams/aconfig/bufferstreams_flags.aconfig
@@ -1,4 +1,5 @@
 package: "com.android.graphics.bufferstreams.flags"
+container: "system"
 
 flag {
   name: "bufferstreams_steel_thread"