diff --git a/turtlebot3_slam/launch/turtlebot3_rtabmap.launch b/turtlebot3_slam/launch/turtlebot3_rtabmap.launch
index 936731fa..83746ffd 100644
--- a/turtlebot3_slam/launch/turtlebot3_rtabmap.launch
+++ b/turtlebot3_slam/launch/turtlebot3_rtabmap.launch
@@ -18,6 +18,7 @@
         <param unless="$(eval model=='waffle')" name="subscribe_depth" type="bool" value="false"/>
         <param name="subscribe_scan"      type="bool"   value="true"/>
         <param name="approx_sync"         type="bool"   value="true"/>
+        <param name="queue_size"          type="int"    value="70"/>
     
         <!-- inputs -->
         <remap from="scan"            to="/scan"/>