diff --git a/testing/scripts/diff-remove-timestamps b/testing/scripts/diff-remove-timestamps
index e235746f93..84bd21aa60 100755
--- a/testing/scripts/diff-remove-timestamps
+++ b/testing/scripts/diff-remove-timestamps
@@ -4,7 +4,7 @@
 
 # Get us "modern" regexps with sed.
 if [ `uname` == "Linux" ]; then
-   sed="sed"
+   sed="sed -r"
 else
    sed="sed -E"
 fi