diff --git a/launch/run_benchmark_ompl.launch b/launch/run_benchmark_ompl.launch
index 066ed63..18d2446 100644
--- a/launch/run_benchmark_ompl.launch
+++ b/launch/run_benchmark_ompl.launch
@@ -1,7 +1,7 @@
 <launch>
 
   <!-- This argument must specify the list of .cfg files to process for benchmarking -->
-  <arg name="cfg" />
+  <arg name="cfg" default="" />
 
   <!-- Load URDF -->
   <include file="$(find mycobot_ros)/launch/planning_context.launch">
diff --git a/launch/warehouse.launch b/launch/warehouse.launch
index fbae8fb..aff99ab 100644
--- a/launch/warehouse.launch
+++ b/launch/warehouse.launch
@@ -1,7 +1,7 @@
 <launch>
 
   <!-- The path to the database must be specified -->
-  <arg name="moveit_warehouse_database_path" />
+  <arg name="moveit_warehouse_database_path" default="" />
 
   <!-- Load warehouse parameters -->
   <include file="$(find mycobot_ros)/launch/warehouse_settings.launch.xml" />