diff --git a/extra/windows/ole32/ole32.factor b/extra/windows/ole32/ole32.factor
index dd20f0942d..6e06830130 100644
--- a/extra/windows/ole32/ole32.factor
+++ b/extra/windows/ole32/ole32.factor
@@ -1,5 +1,5 @@
-USING: alien alien.syntax alien.c-types math kernel sequences
-windows windows.types combinators.lib ;
+USING: alien alien.syntax alien.c-types alien.strings math
+kernel sequences windows windows.types combinators.lib ;
 IN: windows.ole32
 
 LIBRARY: ole32