diff --git a/platforms/tumblr.js b/platforms/tumblr.js
index 4812117..66452d2 100644
--- a/platforms/tumblr.js
+++ b/platforms/tumblr.js
@@ -27,7 +27,7 @@ tumblr.createSource = (user, options, postReducerCallback, cache) => {
 tumblr.isRepost = (post) => {
     let reblog = post.description.querySelector('p > a.tumblr_blog')
     
-    return reblog && reblog.innerHTML !== post.source.user
+    return reblog ? reblog.innerHTML !== post.source.user : false
 }
 
 tumblr.matchesTags = (post, whitelist, blacklist) => {