diff --git a/build.xml b/build.xml
index ef1e6049c..40de7da7f 100644
--- a/build.xml
+++ b/build.xml
@@ -70,7 +70,7 @@
         <echo file="sdk/nbproject/private/platform-private.properties"
               message="nbplatform.default.netbeans.dest.dir=${nbplatform.dir}&#xD;&#xA;"/>
         <echo file="sdk/nbproject/private/platform-private.properties"
-              message="nbplatform.default.harness.dir=${nbplatform.dir}/harness" append="true"/>
+              message="nbplatform.default.harness.dir=${nbplatform.dir}${file.separator}harness" append="true"/>
     </target>
 
 </project>
\ No newline at end of file