diff --git a/platform/mv3/make-rulesets.js b/platform/mv3/make-rulesets.js
index e1454de0e..3307c146a 100644
--- a/platform/mv3/make-rulesets.js
+++ b/platform/mv3/make-rulesets.js
@@ -219,7 +219,7 @@ const isGood = rule =>
 
 async function processNetworkFilters(assetDetails, network) {
     const replacer = (k, v) => {
-        if ( k.startsWith('__') ) { return; }
+        if ( k.startsWith('_') ) { return; }
         if ( Array.isArray(v) ) {
             return v.sort();
         }