diff --git a/error.c b/error.c
index 88b8a0653e..59c6fa7dd6 100644
--- a/error.c
+++ b/error.c
@@ -1085,7 +1085,7 @@ die(void)
 
 RBIMPL_ATTR_FORMAT(RBIMPL_PRINTF_FORMAT, 1, 0)
 static void
-rb_bug_without_die(const char *fmt, va_list args)
+rb_bug_without_die_internal(const char *fmt, va_list args)
 {
     const char *file = NULL;
     int line = 0;
@@ -1097,12 +1097,21 @@ rb_bug_without_die(const char *fmt, va_list args)
     report_bug_valist(file, line, fmt, NULL, args);
 }
 
+void
+rb_bug_without_die(const char *fmt, ...)
+{
+    va_list args;
+    va_start(args, fmt);
+    rb_bug_without_die_internal(fmt, args);
+    va_end(args);
+}
+
 void
 rb_bug(const char *fmt, ...)
 {
     va_list args;
     va_start(args, fmt);
-    rb_bug_without_die(fmt, args);
+    rb_bug_without_die_internal(fmt, args);
     va_end(args);
     die();
 }
diff --git a/internal/error.h b/internal/error.h
index 78b8d1d938..5d53f96b8e 100644
--- a/internal/error.h
+++ b/internal/error.h
@@ -185,6 +185,7 @@ NORETURN(static inline void rb_key_err_raise(VALUE mesg, VALUE recv, VALUE name)
 static inline void Check_Type(VALUE v, enum ruby_value_type t);
 static inline bool rb_typeddata_is_instance_of_inline(VALUE obj, const rb_data_type_t *data_type);
 #define rb_typeddata_is_instance_of rb_typeddata_is_instance_of_inline
+void rb_bug_without_die(const char *fmt, ...);
 
 RUBY_SYMBOL_EXPORT_BEGIN
 /* error.c (export) */