diff --git a/libnetdutils/include/netdutils/UniqueFd.h b/libnetdutils/include/netdutils/UniqueFd.h
index 3b63f34..61101f9 100644
--- a/libnetdutils/include/netdutils/UniqueFd.h
+++ b/libnetdutils/include/netdutils/UniqueFd.h
@@ -57,7 +57,7 @@
     void reset(Fd fd = Fd());
 
     // Implict cast to Fd
-    const operator Fd() const { return mFd; }
+    operator const Fd &() const { return mFd; }
 
   private:
     Fd mFd;