diff --git a/prebuilt/wall_display.yaml b/prebuilt/wall_display.yaml
index f15ae63..4ba0c2b 100644
--- a/prebuilt/wall_display.yaml
+++ b/prebuilt/wall_display.yaml
@@ -8,6 +8,7 @@
 ##### PLEASE only make changes if it is necessary and also the required knowledge is available. #####
 ##### For normal use with the Blueprint, no changes are necessary.                              #####
 #####################################################################################################
+---
 substitutions:
   heater_relay: "1"  # Possible values: 1/2
   temp_min: "16"     # Min supported temperature is 40°F