diff --git a/ui/redux/reducers/comments.js b/ui/redux/reducers/comments.js
index 0c3acf00d..9823a4ca0 100644
--- a/ui/redux/reducers/comments.js
+++ b/ui/redux/reducers/comments.js
@@ -120,7 +120,7 @@ export default handleActions(
         newCommentIds.unshift(comment.comment_id);
         byId[claimId] = newCommentIds;
 
-        if (totalCommentsById[claimId]) {
+        if (totalCommentsById.hasOwnProperty(claimId)) {
           totalCommentsById[claimId] += 1;
         }
 
@@ -596,7 +596,7 @@ export default handleActions(
         }
       }
 
-      if (totalCommentsById[claimId]) {
+      if (totalCommentsById.hasOwnProperty(claimId)) {
         totalCommentsById[claimId] = Math.max(0, totalCommentsById[claimId] - 1);
       }