diff --git a/Android.bp b/Android.bp
index c6828227f3478..80afd48879ad4 100644
--- a/Android.bp
+++ b/Android.bp
@@ -1141,7 +1141,9 @@ doc_defaults {
     metalava_enabled: true,
     metalava_annotations_enabled: true,
     metalava_previous_api: ":public-api-for-metalava-annotations",
-    metalava_merge_annotations_dir: "tools/metalava/manual",
+    metalava_merge_annotations_dirs: [
+        "tools/metalava/manual",
+    ],
 }
 
 droiddoc {