diff --git a/ext/dl/dl.def b/ext/dl/dl.def
index cf50b09464..f537ab247f 100644
--- a/ext/dl/dl.def
+++ b/ext/dl/dl.def
@@ -6,9 +6,7 @@ dlrealloc
 dlstrdup
 rb_ary_to_ptr
 rb_dl_dlopen
-rb_dl_get_callback
 rb_dl_malloc
-rb_dl_set_callback
 rb_dl_strdup
 rb_eDLError
 rb_eDLTypeError