diff --git a/retropikzel/pffi/chicken5.scm b/retropikzel/pffi/chicken5.scm
index 082d349..6d798f3 100644
--- a/retropikzel/pffi/chicken5.scm
+++ b/retropikzel/pffi/chicken5.scm
@@ -60,7 +60,10 @@
              (scheme-name (list-ref expr 1))
              (c-name (symbol->string (cadr (list-ref expr 3))))
              (return-type (pffi-type->native-type (cadr (list-ref expr 4))))
-             (argument-types (map pffi-type->native-type (cadr (list-ref expr 5)))))
+             (argument-types (if (null? (cdr (list-ref expr 5)))
+                               (list)
+                               (map pffi-type->native-type
+                                    (cadr (list-ref expr 5))))))
         (if (null? argument-types)
           `(define ,scheme-name
              (foreign-safe-lambda ,return-type ,c-name))
diff --git a/retropikzel/pffi/shared/struct.scm b/retropikzel/pffi/shared/struct.scm
index f21a1ab..22a433f 100644
--- a/retropikzel/pffi/shared/struct.scm
+++ b/retropikzel/pffi/shared/struct.scm
@@ -1,5 +1,3 @@
-(pffi-define-library pffi-libc-stdlib '("ffi.h") "ffi" '())
-
 (define-record-type <pffi-struct>
   (struct-make c-type size pointer members)
   pffi-struct?