diff --git a/dspace/build.xml b/dspace/build.xml
index 7d062d173b..4b3ed59d0a 100644
--- a/dspace/build.xml
+++ b/dspace/build.xml
@@ -166,7 +166,7 @@ Common usage:
       <arg value="${dspace.dir}/lib" />
       <arg value="${dspace.dir}/oai/WEB-INF/lib" />
     </exec>
-    <copy todir="${dspace.dir}/bin">
+    <copy todir="${dspace.dir}/bin" preservelastmodified="true">
       <fileset dir="bin"/>
     </copy>
     <exec executable="chmod">
@@ -174,10 +174,10 @@ Common usage:
       <arg value="u+x" />
       <arg value="${dspace.dir}/bin" />
     </exec>
-    <copy todir="${dspace.dir}/lib">
+    <copy todir="${dspace.dir}/lib" preservelastmodified="true">
       <fileset dir="lib"/>
     </copy>
-    <copy todir="${dspace.dir}/jsp">
+    <copy todir="${dspace.dir}/jsp" preservelastmodified="true">
       <fileset dir="jsp"/>
     </copy>
     <jar jarfile="${dspace.dir}/lib/dspace.jar"
@@ -196,11 +196,12 @@ Common usage:
   <target name="install_code"
           depends="update"
           description="Do a fresh install of the system, not touching database">
-    <copy todir="${dspace.dir}/config">
+    <copy todir="${dspace.dir}/config" preservelastmodified="true">
       <fileset dir="${basedir}/config"/>
     </copy>
     <copy file="${basedir}/etc/log4j.build.properties"
-          tofile="${dspace.dir}/config/log4j.properties"/>
+          tofile="${dspace.dir}/config/log4j.properties"
+          preservelastmodified="true"/>
   </target>