diff --git a/functions-common b/functions-common
index cc1d42b0d6..9423f9ed90 100644
--- a/functions-common
+++ b/functions-common
@@ -1678,7 +1678,7 @@ function tail_log {
     local logfile=$2
 
     if [[ "$USE_SCREEN" = "True" ]]; then
-        screen_process "$name" "sudo tail -f $logfile | sed 's/\\\\\\\\x1b/\o033/g'"
+        screen_process "$name" "sudo tail -f $logfile | sed -u 's/\\\\\\\\x1b/\o033/g'"
     fi
 }