1 files changed, 1 insertions, 2 deletions
diff --git a/ext/io/wait/wait.c b/ext/io/wait/wait.c
index 13daaf6b53..4b95698ce7 100644
--- a/ext/io/wait/wait.c
+++ b/ext/io/wait/wait.c
@@ -53,8 +53,7 @@ EXTERN struct timeval rb_time_interval _((VALUE time));
 =end
 */
 static VALUE
-io_ready_p(io)
-    VALUE io;
+io_ready_p(VALUE io)
 {
     OpenFile *fptr;
     ioctl_arg n;