1 files changed, 2 insertions, 6 deletions
diff --git a/thread.c b/thread.c
index e1968c44d2..39fdf9d23d 100644
--- a/thread.c
+++ b/thread.c
@@ -3573,9 +3573,7 @@ rb_fd_select(int n, rb_fdset_t *readfds, rb_fdset_t *writefds, rb_fdset_t *excep
     return select(n, r, w, e, timeout);
 }
 
-#if defined __GNUC__ && __GNUC__ >= 5
-# define rb_fd_no_init(fds) ASSUME(!(fds)->fdset && !(fds)->maxfd)
-#endif
+#define rb_fd_no_init(fds) (((fds)->fdset = 0), ((fds)->maxfd = 0))
 
 #undef FD_ZERO
 #undef FD_SET
@@ -3640,9 +3638,7 @@ rb_fd_set(int fd, rb_fdset_t *set)
 #define FD_CLR(i, f)	rb_fd_clr((i), (f))
 #define FD_ISSET(i, f)	rb_fd_isset((i), (f))
 
-#if defined __GNUC__ && __GNUC__ >= 5
-# define rb_fd_no_init(fds) ASSUME(!(fds)->fdset)
-#endif
+#define rb_fd_no_init(fds) ((fds)->fdset = 0)
 
 #endif