diff --git a/tool_conf.xml.sample b/tool_conf.xml.sample
index 8a21f1a0761..83479fd3f9d 100644
--- a/tool_conf.xml.sample
+++ b/tool_conf.xml.sample
@@ -194,7 +194,7 @@
     <tool file="solid_tools/solid_qual_boxplot.xml" />
   </section>
   <section name="NGS: Mapping" id="solexa_tools">
-   <tool file="sr_mapping/lastz_wrapper.xml" />
+   <!-- <tool file="sr_mapping/lastz_wrapper.xml" /> -->
    <tool file="metag_tools/megablast_wrapper.xml" />
    <tool file="metag_tools/megablast_xml_parser.xml" />
    <tool file="sr_mapping/bowtie_wrapper.xml" />