diff --git a/base/include/android-base/unique_fd.h b/base/include/android-base/unique_fd.h
index cd2dc04..b92b711 100644
--- a/base/include/android-base/unique_fd.h
+++ b/base/include/android-base/unique_fd.h
@@ -16,6 +16,7 @@
 
 #pragma once
 
+#include <dirent.h>
 #include <fcntl.h>
 
 #if !defined(_WIN32)
@@ -219,3 +220,13 @@
 template <typename T>
 int close(const android::base::unique_fd_impl<T>&)
     __attribute__((__unavailable__("close called on unique_fd")));
+
+template <typename T>
+FILE* fdopen(const android::base::unique_fd_impl<T>&, const char* mode)
+    __attribute__((__unavailable__("fdopen takes ownership of the fd passed in; either dup the "
+                                   "unique_fd, or use android::base::Fdopen to pass ownership")));
+
+template <typename T>
+DIR* fdopendir(const android::base::unique_fd_impl<T>&) __attribute__((
+    __unavailable__("fdopendir takes ownership of the fd passed in; either dup the "
+                    "unique_fd, or use android::base::Fdopendir to pass ownership")));