diff --git a/libs/binder/ndk/include_cpp/android/binder_auto_utils.h b/libs/binder/ndk/include_cpp/android/binder_auto_utils.h
index 18877af..8d60226 100644
--- a/libs/binder/ndk/include_cpp/android/binder_auto_utils.h
+++ b/libs/binder/ndk/include_cpp/android/binder_auto_utils.h
@@ -313,7 +313,8 @@
     /**
      * Takes ownership of a.
      */
-    explicit ScopedFileDescriptor(int a = -1) : ScopedAResource(a) {}
+    ScopedFileDescriptor() : ScopedFileDescriptor(-1) {}
+    explicit ScopedFileDescriptor(int a) : ScopedAResource(a) {}
     ~ScopedFileDescriptor() {}
     ScopedFileDescriptor(ScopedFileDescriptor&&) = default;
     ScopedFileDescriptor& operator=(ScopedFileDescriptor&&) = default;