diff --git a/config/slam.yaml b/config/slam.yaml
index 4633d56..a21c01d 100644
--- a/config/slam.yaml
+++ b/config/slam.yaml
@@ -13,7 +13,7 @@ slam_toolbox:
     odom_frame: odom
     map_frame: map
     base_frame: base_link
-    scan_topic: scan_filtered
+    scan_topic: /scan_filtered
     mode: mapping #localization
 
     # if you'd like to immediately start continuing a map at a given pose