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-rw-r--r--ext/tk/extconf.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/ext/tk/extconf.rb b/ext/tk/extconf.rb
index 95fdef7968..8c8d833481 100644
--- a/ext/tk/extconf.rb
+++ b/ext/tk/extconf.rb
@@ -207,7 +207,7 @@ EOF
end
# check pthread mode
- if (macro_defined?('HAVE_LIBPTHREAD', '#include "ruby.h"'))
+ if (macro_defined?('HAVE_NATIVETHREAD', '#include "ruby.h"'))
# ruby -> enable
unless tcl_enable_thread
# ruby -> enable && tcl -> disable