diff --git a/postgres/entrypoint.sh b/postgres/entrypoint.sh
index 35a1b35..f6a832e 100755
--- a/postgres/entrypoint.sh
+++ b/postgres/entrypoint.sh
@@ -10,7 +10,8 @@ set +a
 # Create the $DB_TEMPLATE database
 psql -p $POSTGRES_PORT -U $POSTGRES_MAIN_USER -d $POSTGRES_DB -c "CREATE DATABASE $DB_TEMPLATE WITH TEMPLATE = template0;"
 psql -p $POSTGRES_PORT -U $POSTGRES_MAIN_USER -d $POSTGRES_DB -c "\\c $DB_TEMPLATE;"
-psql -p $POSTGRES_PORT -U $POSTGRES_MAIN_USER -d $POSTGRES_DB -c "CREATE EXTENSION IF NOT EXISTS unaccent;"
+psql -p $POSTGRES_PORT -U $POSTGRES_MAIN_USER -d $DB_TEMPLATE -c "CREATE EXTENSION IF NOT EXISTS unaccent;"
+psql -p $POSTGRES_PORT -U $POSTGRES_MAIN_USER -d $DB_TEMPLATE -c "ALTER FUNCTION unaccent(text) IMMUTABLE;"
 
 # Create Odoo user and give proper privileges
 psql -p $POSTGRES_PORT -U $POSTGRES_MAIN_USER -d $POSTGRES_DB -c "CREATE USER $DB_USER WITH PASSWORD '$DB_PASSWORD';"