diff --git a/pcl/vector.lisp b/pcl/vector.lisp
index 013c99fd823c47ca9da0730c9f22675c4cac5188..3dcfca3c7d5c4341946990d472eb0bf1a08f3935 100644
--- a/pcl/vector.lisp
+++ b/pcl/vector.lisp
@@ -880,7 +880,7 @@
     type))
 
 (defvar *variable-declarations-without-argument*
-  '(ignore special dynamic-extent
+  '(ignore ignorable special dynamic-extent
     array atom base-char bignum bit bit-vector character common compiled-function
     complex cons double-float extended-char fixnum float function hash-table integer
     keyword list long-float nil null number package pathname random-state ratio