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-rw-r--r--ext/io/wait/extconf.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/ext/io/wait/extconf.rb b/ext/io/wait/extconf.rb
index 1352ef202e..e8181d25f5 100644
--- a/ext/io/wait/extconf.rb
+++ b/ext/io/wait/extconf.rb
@@ -3,7 +3,7 @@ target = "io/wait"
unless macro_defined?("DOSISH", "#include <ruby.h>")
fionread = %w[sys/ioctl.h sys/filio.h].find do |h|
- checking_for("FIONREAD") {have_macro("FIONREAD", h)}
+ have_macro("FIONREAD", h)
end
if fionread
$defs << "-DFIONREAD_HEADER=\"<#{fionread}>\""