diff --git a/peak_det_eval.grc b/peak_det_eval.grc
index 6c2a7d0..754ab49 100644
--- a/peak_det_eval.grc
+++ b/peak_det_eval.grc
@@ -224,6 +224,33 @@
       <value>130e6</value>
     </param>
   </block>
+  <block>
+    <key>variable</key>
+    <param>
+      <key>comment</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(808, 12)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>id</key>
+      <value>peak_thresh_dB</value>
+    </param>
+    <param>
+      <key>value</key>
+      <value>15</value>
+    </param>
+  </block>
   <block>
     <key>variable</key>
     <param>
@@ -1944,7 +1971,7 @@
     </param>
     <param>
       <key>peak_height_min</key>
-      <value>18</value>
+      <value>peak_thresh_dB</value>
     </param>
     <param>
       <key>peak_width_max</key>
@@ -2019,7 +2046,7 @@
     </param>
     <param>
       <key>peak_height_min</key>
-      <value>18</value>
+      <value>peak_thresh_dB</value>
     </param>
     <param>
       <key>peak_width_max</key>