diff --git a/build/bakefiles/Bakefiles.bkgen b/build/bakefiles/Bakefiles.bkgen
index 7a24325224..66629a7f71 100644
--- a/build/bakefiles/Bakefiles.bkgen
+++ b/build/bakefiles/Bakefiles.bkgen
@@ -66,6 +66,7 @@
     <del-formats files="../../utils/ifacecheck/src/*">msevc4prj</del-formats>
     <del-formats files="../../utils/wxrc/*">msevc4prj</del-formats>
     <del-formats files="../../tests/*">msevc4prj</del-formats>
+    <del-formats files="../../tests/benchmarks/*">msevc4prj</del-formats>
 
     <!-- HtmlCtrl sample is Cocoa only (autoconf format) -->
     <del-formats files="../../samples/html/htmlctrl/htmlctrl.bkl">