diff --git a/nav-app/src/app/classes/view-model.ts b/nav-app/src/app/classes/view-model.ts
index 3dcf34861..48dd8b99f 100644
--- a/nav-app/src/app/classes/view-model.ts
+++ b/nav-app/src/app/classes/view-model.ts
@@ -835,6 +835,7 @@ export class ViewModel {
             }
             // filter by platform
             let platforms = new Set(technique.platforms);
+            if (platforms.size == 0) { platforms.add('None'); }
             for (let platform of this.filters.platforms.selection) {
                 if (platforms.has(platform)) {
                     techniqueVM.setIsVisible(true);
diff --git a/nav-app/src/app/services/data.service.ts b/nav-app/src/app/services/data.service.ts
index eb712ecc1..0043f4075 100755
--- a/nav-app/src/app/services/data.service.ts
+++ b/nav-app/src/app/services/data.service.ts
@@ -210,7 +210,9 @@ export class DataService {
 
         // parse platforms
         allTechniques.forEach((technique) => {
-            technique.platforms?.forEach(platforms.add, platforms);
+            if (!technique.deprecated && !technique.revoked) {
+                technique.platforms?.forEach(platforms.add, platforms);
+            }
         });
 
         return platforms;