diff --git a/extra/windows/winsock/winsock.factor b/extra/windows/winsock/winsock.factor
index b9f8739a19..39d11b562b 100644
--- a/extra/windows/winsock/winsock.factor
+++ b/extra/windows/winsock/winsock.factor
@@ -1,7 +1,7 @@
 ! Copyright (C) 2006 Mackenzie Straight, Doug Coleman.
 
-USING: alien alien.c-types alien.syntax arrays byte-arrays
-kernel math sequences windows.types windows.kernel32
+USING: alien alien.c-types alien.strings alien.syntax arrays
+byte-arrays kernel math sequences windows.types windows.kernel32
 windows.errors structs windows math.bitfields ;
 IN: windows.winsock