diff --git a/libs/binder/OS.cpp b/libs/binder/OS.cpp
index 6eb7272..cc4a03b 100644
--- a/libs/binder/OS.cpp
+++ b/libs/binder/OS.cpp
@@ -48,4 +48,14 @@
     return OK;
 }
 
+status_t dupFileDescriptor(int oldFd, int* newFd) {
+    int ret = fcntl(oldFd, F_DUPFD_CLOEXEC, 0);
+    if (ret < 0) {
+        return -errno;
+    }
+
+    *newFd = ret;
+    return OK;
+}
+
 } // namespace android