diff --git a/src/org/jitsi/impl/neomedia/notify/AudioNotifierServiceImpl.java b/src/org/jitsi/impl/neomedia/notify/AudioNotifierServiceImpl.java
index 2867bb40ca8a19f1814d794d65db513a17295b78..f2a79c283805d250bb596c9f955326c28de663c9 100644
--- a/src/org/jitsi/impl/neomedia/notify/AudioNotifierServiceImpl.java
+++ b/src/org/jitsi/impl/neomedia/notify/AudioNotifierServiceImpl.java
@@ -283,5 +283,12 @@ public boolean equals(Object o)
 
             return true;
         }
+
+        @Override
+        public int hashCode()
+        {
+            return (uri != null ? uri.hashCode() : 0)
+                + (isPlayback ? 1 : 0);
+        }
     }
 }