diff --git a/src/org/fdroid/fdroid/AppListManager.java b/src/org/fdroid/fdroid/AppListManager.java
index 1902c8d87..508114c1e 100644
--- a/src/org/fdroid/fdroid/AppListManager.java
+++ b/src/org/fdroid/fdroid/AppListManager.java
@@ -176,6 +176,7 @@ public class AppListManager {
                 return false;
             return true;
         }
+        if (app.categories == null) return false;
         return app.categories.contains(category);
     }