diff --git a/library/win32/win32-io-internals.factor b/library/win32/win32-io-internals.factor
index 4cb286b0ed..70088b50be 100644
--- a/library/win32/win32-io-internals.factor
+++ b/library/win32/win32-io-internals.factor
@@ -25,7 +25,7 @@
 
 IN: win32-io-internals
 USING: alien errors kernel kernel-internals lists math namespaces threads 
-       vectors win32-api io generic io-internals sequences prettyprint ;
+       vectors win32-api io generic io-internals sequences ;
 
 SYMBOL: completion-port
 SYMBOL: io-queue