diff --git a/basis/environment/winnt/winnt.factor b/basis/environment/winnt/winnt.factor
index cba92a0e3c..894415ace8 100755
--- a/basis/environment/winnt/winnt.factor
+++ b/basis/environment/winnt/winnt.factor
@@ -3,7 +3,7 @@
 USING: alien.strings fry io.encodings.utf16n kernel
 splitting windows windows.kernel32 windows.types system
 environment alien.data sequences windows.errors
-io.streams.memory io.encodings io ;
+io.streams.memory io.encodings io specialized-arrays ;
 SPECIALIZED-ARRAY: TCHAR
 IN: environment.winnt
 
diff --git a/basis/windows/errors/errors.factor b/basis/windows/errors/errors.factor
index 483494ba0c..a7a41433f7 100755
--- a/basis/windows/errors/errors.factor
+++ b/basis/windows/errors/errors.factor
@@ -1,7 +1,7 @@
 USING: alien.data kernel locals math math.bitwise
 windows.kernel32 sequences byte-arrays unicode.categories
 io.encodings.string io.encodings.utf16n alien.strings
-arrays literals windows.types ;
+arrays literals windows.types specialized-arrays ;
 SPECIALIZED-ARRAY: TCHAR
 IN: windows.errors