diff --git a/Tusker/Views/ContentTextView.swift b/Tusker/Views/ContentTextView.swift
index e8a2af3c..ff36eef9 100644
--- a/Tusker/Views/ContentTextView.swift
+++ b/Tusker/Views/ContentTextView.swift
@@ -173,15 +173,17 @@ class ContentTextView: LinkTextView, BaseEmojiLabel {
     
     // MARK: - Navigation
     
-    func getViewController(forLink url: URL, inRange range: NSRange) -> UIViewController {
+    func getViewController(forLink url: URL, inRange range: NSRange) -> UIViewController? {
         let text = (self.text as NSString).substring(with: range)
         
         if let mention = getMention(for: url, text: text) {
             return ProfileViewController(accountID: mention.id, mastodonController: mastodonController!)
         } else if let tag = getHashtag(for: url, text: text) {
             return HashtagTimelineViewController(for: tag, mastodonController: mastodonController!)
-        } else {
+        } else if url.scheme == "https" || url.scheme == "http" {
             return SFSafariViewController(url: url)
+        } else {
+            return nil
         }
     }