diff --git a/libstdc++-v3/include/ext/stdio_sync_filebuf.h b/libstdc++-v3/include/ext/stdio_sync_filebuf.h
index 178b471957a..90765e55831 100644
--- a/libstdc++-v3/include/ext/stdio_sync_filebuf.h
+++ b/libstdc++-v3/include/ext/stdio_sync_filebuf.h
@@ -32,7 +32,6 @@
 #pragma GCC system_header
 
 #include <streambuf>
-#include <unistd.h>
 #include <cstdio>
 #include <bits/c++io.h>  // For __c_file
 #include <bits/move.h>   // For __exchange
diff --git a/libstdc++-v3/src/c++17/fs_ops.cc b/libstdc++-v3/src/c++17/fs_ops.cc
index 72755c98a5a..04a559ab1d6 100644
--- a/libstdc++-v3/src/c++17/fs_ops.cc
+++ b/libstdc++-v3/src/c++17/fs_ops.cc
@@ -1130,7 +1130,7 @@ fs::permissions(const path& p, perms prms, perm_options opts,
 #else
   if (nofollow && is_symlink(st))
     ec = std::make_error_code(std::errc::not_supported);
-  else if (posix::chmod(p.c_str(), static_cast<mode_t>(prms)))
+  else if (posix::chmod(p.c_str(), static_cast<posix::mode_t>(prms)))
     err = errno;
 #endif