1 files changed, 0 insertions, 1 deletions
diff --git a/internal.h b/internal.h
index e3ab0dec8b..c91670a388 100644
--- a/internal.h
+++ b/internal.h
@@ -805,7 +805,6 @@ int rb_is_attrset_name(VALUE name);
 int rb_is_local_name(VALUE name);
 int rb_is_method_name(VALUE name);
 int rb_is_junk_name(VALUE name);
-void rb_gc_mark_symbols(int full_mark);
 ID rb_make_internal_id(void);
 void rb_gc_free_dsymbol(VALUE);
 VALUE rb_str_dynamic_intern(VALUE);