1 files changed, 3 insertions, 0 deletions
diff --git a/internal.h b/internal.h
index 403b91bade..c1890961c3 100644
--- a/internal.h
+++ b/internal.h
@@ -772,6 +772,9 @@ VALUE rb_big2str_gmp(VALUE x, int base);
 VALUE rb_str2big_gmp(VALUE arg, int base, int badcheck);
 #endif
 
+/* error.c */
+int rb_bug_reporter_add(void (*func)(FILE *, void *), void *data);
+
 /* file.c */
 #ifdef __APPLE__
 VALUE rb_str_normalize_ospath(const char *ptr, long len);