diff --git a/libs/ftl/Android.bp b/libs/ftl/Android.bp
index 97626be..2226791 100644
--- a/libs/ftl/Android.bp
+++ b/libs/ftl/Android.bp
@@ -14,6 +14,7 @@
         address: true,
     },
     srcs: [
+        "cast_test.cpp",
         "future_test.cpp",
         "small_map_test.cpp",
         "small_vector_test.cpp",