diff --git a/Android.bp b/Android.bp
index 6abdab8..962984c 100644
--- a/Android.bp
+++ b/Android.bp
@@ -13,6 +13,7 @@
 // limitations under the License.
 
 subdirs = [
+    "adapter",
     "base",           // libhidlbase
     "libhidlmemory",  // libhidlmemory
     "transport",      // libhidltransport