diff --git a/homeassistant/components/octoprint/sensor.py b/homeassistant/components/octoprint/sensor.py
index 9c488564ea9..c7b81df2ef8 100644
--- a/homeassistant/components/octoprint/sensor.py
+++ b/homeassistant/components/octoprint/sensor.py
@@ -32,7 +32,7 @@ def setup_platform(hass, config, add_entities, discovery_info=None):
                 "If you do not want to have your printer on <br />"
                 " at all times, and you would like to monitor <br /> "
                 "temperatures, please add <br />"
-                "bed and/or number&#95of&#95tools to your configuration <br />"
+                "bed and/or number&#95;of&#95;tools to your configuration <br />"
                 "and restart.",
                 title=NOTIFICATION_TITLE,
                 notification_id=NOTIFICATION_ID,