1 files changed, 6 insertions, 1 deletions
diff --git a/bits/types.h b/bits/types.h
index d79851c..2b3edab 100644
--- a/bits/types.h
+++ b/bits/types.h
@@ -98,8 +98,13 @@ typedef unsigned long int __fd_mask;
 /* fd_set for select and pselect.  */
 typedef struct
   {
-    /* XPG4.2 requires this member name.  */
+    /* XPG4.2 requires this member name.  Otherwise avoid the name
+       from the user namespace.  */
+#ifdef __USE_XOPEN
     __fd_mask fds_bits[(__FD_SETSIZE + (__NFDBITS - 1)) / __NFDBITS];
+#else
+    __fd_mask __fds_bits[(__FD_SETSIZE + (__NFDBITS - 1)) / __NFDBITS];
+#endif
   } __fd_set;