diff --git a/UI/WebServerResources/js/Mailer/Mailbox.service.js b/UI/WebServerResources/js/Mailer/Mailbox.service.js
index c1745b630..f5bd58aa8 100644
--- a/UI/WebServerResources/js/Mailer/Mailbox.service.js
+++ b/UI/WebServerResources/js/Mailer/Mailbox.service.js
@@ -1089,7 +1089,7 @@
             }
           }
         }
-        if (data.unseenCount) {
+        if (angular.isDefined(data.unseenCount)) {
           _this.unseenCount = data.unseenCount;
         }