diff --git a/app/src/main/java/com/murrayc/galaxyzoo/app/Utils.java b/app/src/main/java/com/murrayc/galaxyzoo/app/Utils.java
index e32017d6..11d1e06d 100644
--- a/app/src/main/java/com/murrayc/galaxyzoo/app/Utils.java
+++ b/app/src/main/java/com/murrayc/galaxyzoo/app/Utils.java
@@ -149,6 +149,10 @@ public static String getTranslationFilePath(final String language, final String
 
     @NonNull
     public static String getTalkUri(final String zooniverseId) {
+        if (zooniverseId == null) {
+            return null;
+        }
+
         return Config.TALK_URI + zooniverseId;
     }