diff --git a/launch/blob_detector.launch b/launch/blob_detector.launch
index 4256e66790d9fb1351b425573f56959fb8caee47..9562a8c6a11f00efbd6b748d3383e2c119bf1b11 100644
--- a/launch/blob_detector.launch
+++ b/launch/blob_detector.launch
@@ -31,7 +31,6 @@
         pkg="iri_blob_detector"
         type="iri_blob_detector"
         output="screen">
-    <param name="window_size" value="15"/>
     <remap from="/blob/image_in/camera_info"
              to="/usb_cam/camera_info"/>
     <remap from="/blob/image_in/image_raw"
diff --git a/launch/blob_detector_sim.launch b/launch/blob_detector_sim.launch
index bbca3e3a7dbc97ad9981ea2aedf4d856494b33c1..9b307fd5c53628779dc278f54c9f9e10809b2eae 100644
--- a/launch/blob_detector_sim.launch
+++ b/launch/blob_detector_sim.launch
@@ -7,7 +7,6 @@
         pkg="iri_blob_detector"
         type="iri_blob_detector"
         output="screen">
-    <param name="window_size" value="15"/>
     <remap from="/blob/image_in/camera_info"
              to="/usb_cam/camera_info"/>
     <remap from="/blob/image_in/image_raw"