1 files changed, 0 insertions, 6 deletions
diff --git a/dln.h b/dln.h
index f1525efeb2..d3e2ad7f17 100644
--- a/dln.h
+++ b/dln.h
@@ -12,12 +12,6 @@
 #ifndef DLN_H
 #define DLN_H
 
-#ifdef __cplusplus
-# ifndef  HAVE_STDARG_PROTOTYPES
-#  define HAVE_STDARG_PROTOTYPES 1
-# endif
-#endif
-
 RUBY_SYMBOL_EXPORT_BEGIN
 
 #ifndef DLN_FIND_EXTRA_ARG