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-rw-r--r--ext/tk/tkutil/extconf.rb1
1 files changed, 0 insertions, 1 deletions
diff --git a/ext/tk/tkutil/extconf.rb b/ext/tk/tkutil/extconf.rb
index ed5de0ee64..34b91632eb 100644
--- a/ext/tk/tkutil/extconf.rb
+++ b/ext/tk/tkutil/extconf.rb
@@ -7,7 +7,6 @@ end
if has_tk
require 'mkmf'
- have_header("ruby/ruby.h")
have_func("rb_obj_instance_exec", "ruby.h")
have_func("rb_sym_to_s", "ruby.h")
have_func("strndup", "string.h")