diff --git a/examples/wifi_rx.grc b/examples/wifi_rx.grc
index db8be82..f82c260 100644
--- a/examples/wifi_rx.grc
+++ b/examples/wifi_rx.grc
@@ -1063,6 +1063,10 @@
       <key>algo</key>
       <value>chan_est</value>
     </param>
+    <param>
+      <key>bw</key>
+      <value>samp_rate</value>
+    </param>
     <param>
       <key>alias</key>
       <value></value>
@@ -1083,6 +1087,10 @@
       <key>_enabled</key>
       <value>True</value>
     </param>
+    <param>
+      <key>freq</key>
+      <value>freq</value>
+    </param>
     <param>
       <key>_coordinate</key>
       <value>(448, 683)</value>