1 files changed, 1 insertions, 1 deletions
diff --git a/ruby.h b/ruby.h
index 1ad94a60c1..5b5e2db716 100644
--- a/ruby.h
+++ b/ruby.h
@@ -394,7 +394,7 @@ struct RData {
 #define DATA_PTR(dta) (RDATA(dta)->data)
 
 /*
-#define RUBY_DATA_FUNC(func) ((void (*)_((void*)))func)
+#define RUBY_DATA_FUNC(func) ((void (*)(void*))func)
 */
 typedef void (*RUBY_DATA_FUNC)(void*);