diff --git a/basis/tools/disassembler/udis/udis-tests.factor b/basis/tools/disassembler/udis/udis-tests.factor
index 522893f368..55e113e1bd 100644
--- a/basis/tools/disassembler/udis/udis-tests.factor
+++ b/basis/tools/disassembler/udis/udis-tests.factor
@@ -2,7 +2,14 @@ IN: tools.disassembler.udis.tests
 USING: tools.disassembler.udis tools.test alien.c-types system combinators kernel ;
 
 {
-    { [ cpu x86.32? ] [ [ 604 ] [ ud heap-size ] unit-test ] }
+    {
+        [ cpu x86.32? ]
+        [
+            os windows?
+            [ [ 624 ] [ ud heap-size ] unit-test ]
+            [ [ 604 ] [ ud heap-size ] unit-test ] if
+        ]
+    }
     { [ cpu x86.64? ] [ [ 672 ] [ ud heap-size ] unit-test ] }
     [ ]
 } cond
\ No newline at end of file