diff --git a/custom_components/openmower/config_flow.py b/custom_components/openmower/config_flow.py
index 4296f00..123aaa2 100644
--- a/custom_components/openmower/config_flow.py
+++ b/custom_components/openmower/config_flow.py
@@ -16,7 +16,7 @@
 
 STEP_USER_DATA_SCHEMA = vol.Schema(
     {
-        vol.Required(CONF_PREFIX, default="openmower"): str,
+        vol.Optional(CONF_PREFIX, default="openmower"): str,
         vol.Optional(CONF_LATITUDE): float,
         vol.Optional(CONF_LONGITUDE): float,
     }