diff --git a/gdb/testsuite/gdb.base/fileio.c b/gdb/testsuite/gdb.base/fileio.c
index 9c40eb4d39..591b3b6758 100644
--- a/gdb/testsuite/gdb.base/fileio.c
+++ b/gdb/testsuite/gdb.base/fileio.c
@@ -103,7 +103,7 @@ test_open ()
     close (ret);
   /* Open for write but no write permission */
   errno = 0;
-  ret = open (NOWRITE, O_CREAT | O_RDONLY, S_IRUSR);
+  ret = open (NOWRITE, O_CREAT | O_RDONLY, S_IRUSR | S_IWUSR);
   if (ret >= 0)
     {
       close (ret);