diff --git a/wdiff.spec b/wdiff.spec
index 19d2799..3ba6404 100644
--- a/wdiff.spec
+++ b/wdiff.spec
@@ -46,14 +46,13 @@ produce a nicer display of word differences between the original files.
 %setup -q
 
 # Fix ISO-8859-1-encoded files
-tmp="$(mktemp)"
 for fn in BACKLOG ChangeLog
 do
-  iconv --from=ISO-8859-1 --to=UTF-8 "${fn}" > "${tmp}"
-  touch -r "${fn}" "${tmp}"
-  cp -p "${tmp}" "${fn}"
+  iconv --from=ISO-8859-1 --to=UTF-8 "${fn}" > "${fn}.iconv"
+  touch -r "${fn}" "${fn}.iconv"
+  chmod -v --reference="${fn}" "${fn}.iconv"
+  mv -f "${fn}.iconv" "${fn}"
 done
-rm "${tmp}"
 
 
 %build