diff --git a/scheduler.scm b/scheduler.scm
index f42ae09..ad9de37 100644
--- a/scheduler.scm
+++ b/scheduler.scm
@@ -82,7 +82,7 @@ static struct pollfd *C_fdset_set = NULL;
 
 C_inline int C_fd_ready(int fd, int pos, int what) {
   assert(fd == C_fdset_set[pos].fd); /* Must match position in ##sys#fd-list! */
-  return(C_fdset_set[pos].revents & what);
+  return(C_fdset_set[pos].revents);
 }
 
 #define C_fd_input_ready(fd,pos)  C_mk_bool(C_fd_ready(C_unfix(fd), C_unfix(pos),POLLIN))