diff --git a/launch/azimut3/az3_mapping_robot.launch b/launch/azimut3/az3_mapping_robot.launch
index 99dc3093..c36bd8c6 100644
--- a/launch/azimut3/az3_mapping_robot.launch
+++ b/launch/azimut3/az3_mapping_robot.launch
@@ -23,7 +23,7 @@
   <!-- SLAM (robot side) -->
   <!-- args: "delete_db_on_start" and "udebug" -->
   <group ns="rtabmap">
-    <node name="rtabmap" pkg="rtabmap" type="rtabmap" output="screen" args="">
+    <node name="rtabmap" pkg="rtabmap" type="rtabmap" output="screen" args="--delete_db_on_start">
 	  <param name="frame_id" type="string" value="base_footprint"/>
 	
 	  <param name="subscribe_depth" type="bool" value="true"/>