diff --git a/.templates/90-config_yaml.sh b/.templates/90-config_yaml.sh
index 3743c2929..e5b1eb1bd 100644
--- a/.templates/90-config_yaml.sh
+++ b/.templates/90-config_yaml.sh
@@ -57,6 +57,11 @@ else
     # bashio::exit.nok
 fi
 
+# Check if = instead of :
+if [[ "$(grep -c "=" "config.yaml")" > 2 ]]; then
+    bashio::log.warning 'Are you sure you did not use "KEY=VALUE" ? yaml nomenclature requires "KEY:VALUE"'
+fi
+
 # Export all yaml entries as env variables
 # Helper function
 function parse_yaml {