diff --git a/extra/unix/system-call/system-call.factor b/extra/unix/system-call/system-call.factor
index 5a77693ed7..f1a6f8811e 100644
--- a/extra/unix/system-call/system-call.factor
+++ b/extra/unix/system-call/system-call.factor
@@ -1,6 +1,6 @@
 
 USING: kernel continuations sequences math accessors inference macros
-       fry arrays.lib unix ;
+       fry arrays.lib unix.ffi ;
 
 IN: unix.system-call