diff --git a/brouter-core/src/main/java/btools/router/VoiceHintProcessor.java b/brouter-core/src/main/java/btools/router/VoiceHintProcessor.java
index 6b4f37e..1a63a0a 100644
--- a/brouter-core/src/main/java/btools/router/VoiceHintProcessor.java
+++ b/brouter-core/src/main/java/btools/router/VoiceHintProcessor.java
@@ -250,8 +250,10 @@ public final class VoiceHintProcessor {
 
       if (input.cmd == VoiceHint.C && !input.goodWay.isLinktType()) {
         int badWayPrio = 0;
-        for (MessageData md : input.badWays) {
-          badWayPrio = Math.max(badWayPrio, md.getPrio());
+        if (input.badWays != null) {
+          for (MessageData md : input.badWays) {
+            badWayPrio = Math.max(badWayPrio, md.getPrio());
+          }
         }
         if (input.goodWay.getPrio() < badWayPrio) {
           results.add(input);