1 files changed, 2 insertions, 0 deletions
diff --git a/ruby.h b/ruby.h
index 31a147fcc9..e5ff9769e4 100644
--- a/ruby.h
+++ b/ruby.h
@@ -579,6 +579,8 @@ EXTERN VALUE rb_eNameError;
 EXTERN VALUE rb_eSyntaxError;
 EXTERN VALUE rb_eLoadError;
 
+EXTERN VALUE rb_defout, rb_stdin, rb_stdout, rb_stderr, ruby_errinfo;
+
 static inline VALUE
 #if defined(__cplusplus)
 rb_class_of(VALUE obj)