diff --git a/include/wx/msw/setup0.h b/include/wx/msw/setup0.h
index cb61883d64..306453c4d9 100644
--- a/include/wx/msw/setup0.h
+++ b/include/wx/msw/setup0.h
@@ -846,8 +846,12 @@
 #define wxUSE_RESOURCE_LOADING_IN_MSW     1
                                 // Use dynamic icon/cursor loading/saving code
                                 // under MSW.
+
+// use wxExpr (a.k.a. PrologIO)
+#define wxUSE_PROLOGIO          0
+
+// Use .wxr resource mechanism (requires PrologIO library)
 #define wxUSE_WX_RESOURCES      0
-                                // Use .wxr resource mechanism (requires PrologIO library)
 
 #define wxUSE_MOUSEWHEEL        1
                                 // Include mouse wheel support