diff --git a/src/Core/BackendInterface.vala b/src/Core/BackendInterface.vala
index 3a2b84f55..99e646192 100644
--- a/src/Core/BackendInterface.vala
+++ b/src/Core/BackendInterface.vala
@@ -39,16 +39,4 @@ public interface AppCenterCore.Backend : Object {
     public abstract async bool update_package (Package package, ChangeInformation? change_info, Cancellable? cancellable) throws GLib.Error;
     public abstract async bool remove_package (Package package, ChangeInformation? change_info, Cancellable? cancellable) throws GLib.Error;
     public abstract async bool repair (Cancellable? cancellable) throws GLib.Error;
-
-    protected bool validate (AppStream.Component component) {
-        if (component.get_kind () == AppStream.ComponentKind.CONSOLE_APP) {
-            return false;
-        }
-
-        if (component.get_kind () == AppStream.ComponentKind.RUNTIME) {
-            return false;
-        }
-
-        return true;
-    }
 }
diff --git a/src/Core/FlatpakBackend.vala b/src/Core/FlatpakBackend.vala
index 10e0d59c7..823d81484 100644
--- a/src/Core/FlatpakBackend.vala
+++ b/src/Core/FlatpakBackend.vala
@@ -1222,6 +1222,18 @@ public class AppCenterCore.FlatpakBackend : Backend, Object {
         package_list = new_package_list;
     }
 
+    private bool validate (AppStream.Component component) {
+        if (component.get_kind () == CONSOLE_APP) {
+            return false;
+        }
+
+        if (component.get_kind () == RUNTIME) {
+            return false;
+        }
+
+        return true;
+    }
+
     private string generate_package_list_key (bool system, string origin, string bundle_id) {
         unowned string installation = system ? "system" : "user";
         return "%s/%s/%s".printf (installation, origin, bundle_id);