diff --git a/tools/xcms/msnbase_readmsdata.xml b/tools/xcms/msnbase_readmsdata.xml
index 1c4fa5fae..ca03b6bd2 100644
--- a/tools/xcms/msnbase_readmsdata.xml
+++ b/tools/xcms/msnbase_readmsdata.xml
@@ -7,6 +7,10 @@
     </macros>
 
     <expand macro="requirements"/>
+    <required_files>
+        <include path="msnbase_readmsdata.r" />
+        <include path="lib.r" />
+    </required_files>
     <expand macro="stdio"/>
 
     <command><![CDATA[