1 files changed, 1 insertions, 1 deletions
diff --git a/ruby.c b/ruby.c
index 35c7b457f5..297f0e2812 100644
--- a/ruby.c
+++ b/ruby.c
@@ -1211,7 +1211,7 @@ rb_f_chomp(argc, argv)
     return str;
 }
 
-void rb_stdio_set_default_encoding();
+void rb_stdio_set_default_encoding(void);
 
 static VALUE
 process_options(int argc, char **argv, struct cmdline_options *opt)