--- a/vlock       2020-06-22 10:03:48.700469805 -0000
+++ b/vlock       2020-06-22 10:03:57.880385148 -0000
@@ -17,7 +17,7 @@
 set -e
 
 # Magic characters to clear the terminal.
-CLEAR_SCREEN="`echo -e '\033[H\033[J'`"
+CLEAR_SCREEN="`printf '\033[H\033[J'`"
 
 # Enter message that is common to different the messages.
 VLOCK_ENTER_PROMPT="Please press [ENTER] to unlock."