diff --git a/basis/unix/bsd/netbsd/netbsd.factor b/basis/unix/bsd/netbsd/netbsd.factor
index 5853210d13..8ca78c72a6 100644
--- a/basis/unix/bsd/netbsd/netbsd.factor
+++ b/basis/unix/bsd/netbsd/netbsd.factor
@@ -1,4 +1,4 @@
-USING: alien.syntax alien.c-types math vocabs.loader constants ;
+USING: alien.syntax alien.c-types math vocabs.loader constants alias ;
 IN: unix
 
 CONSTANT: FD_SETSIZE 256
diff --git a/basis/unix/bsd/openbsd/openbsd.factor b/basis/unix/bsd/openbsd/openbsd.factor
index 46f889cef9..4d40e9e502 100644
--- a/basis/unix/bsd/openbsd/openbsd.factor
+++ b/basis/unix/bsd/openbsd/openbsd.factor
@@ -1,4 +1,4 @@
-USING: alien.syntax constants ;
+USING: alien.syntax constants alias ;
 IN: unix
 
 CONSTANT: FD_SETSIZE 1024