diff --git a/README.md b/README.md
index 80b4763..67c96d4 100644
--- a/README.md
+++ b/README.md
@@ -42,6 +42,16 @@ The `vrt.sh` script is meant to be called regularly via a Cronjob (every 5 hours
 or more, as the datasets will be downloaded and published again at each run),
 with the previous variables defined.
 
+## Optional variables
+
+The following environment variables are optional:
+
+```
+# export ACTIVATE_GEOMETRY_TYPE=false 
+True by default
+```
+
+
 # Docker
 
 The provided `Dockerfile` is meant to build the `vrt-bot` image, and a build can be
diff --git a/vrt.sh b/vrt.sh
index 99ec377..e70ced4 100755
--- a/vrt.sh
+++ b/vrt.sh
@@ -31,6 +31,10 @@ touch ${SOURCEDIR}/vrtbot.log
    then
         cd "${SOURCEDIR}"
 
+        params=()
+        if [[ ${ACTIVATE_GEOMETRY_TYPE:-true} == true ]]; then
+            params=(-nlt PROMOTE_TO_MULTI)
+        fi
         # cycle vrt
         for vrt in *.vrt;
         do
@@ -38,7 +42,7 @@ touch ${SOURCEDIR}/vrtbot.log
             /usr/bin/ogr2ogr \
                 -f Postgresql \
                 -overwrite \
-                PG:"active_schema=${ACTIVESCHEMA}" "${vrt}" -lco SCHEMA=${ACTIVESCHEMA} -lco OVERWRITE=yes -lco GEOMETRY_NAME=geometry -nlt PROMOTE_TO_MULTI  -lco DESCRIPTION="import par ${JOB_NAME}/${BUILD_NUMBER} le ${DATE} - ${SOURCEDIR}/${vrt}" 2>&1 | tee -a vrtbot.log
+                PG:"active_schema=${ACTIVESCHEMA}" "${vrt}" -lco SCHEMA=${ACTIVESCHEMA} -lco OVERWRITE=yes -lco GEOMETRY_NAME=geometry "${params[@]}" -lco DESCRIPTION="import par ${JOB_NAME}/${BUILD_NUMBER} le ${DATE} - ${SOURCEDIR}/${vrt}" 2>&1 | tee -a vrtbot.log
             # post import sql
             if [ -f "${vrt}.sql" ]; then
                 echo "script sql après import trouvé" | tee -a vrtbot.log