diff --git a/ffi.lisp b/ffi.lisp
index 35d5a2f..7f56fc9 100644
--- a/ffi.lisp
+++ b/ffi.lisp
@@ -1,6 +1,7 @@
 ;; Foreign functions
 
 (in-package :cl-sipc)
+(use-package :cl-sipc-mem)
 
 (defctype si-type :int)
 (defconstant +si-string+ 0)