diff --git a/create_documentation b/create_documentation
index cfe8fb0f82aab86e153268d21a086b3b6bc57961_Y3JlYXRlX2RvY3VtZW50YXRpb24=..3890ede2f29324dd618b3c594101ae336110b3a4_Y3JlYXRlX2RvY3VtZW50YXRpb24= 100755
--- a/create_documentation
+++ b/create_documentation
@@ -12,7 +12,7 @@
 here=$(dirname $0)
 project_home=$(cd $here && cd .. && echo $PWD)
 project_name_from_home=$(basename $project_home)
-project_name=${ODOO_SCRIPT_PROJECT_NAME:project_name_from_home}
+project_name=${ODOO_SCRIPT_PROJECT_NAME:-project_name_from_home}
 python=python
 
 format=html