diff --git a/SignalServiceKit/src/Messages/Attachments/TSAttachmentStream.m b/SignalServiceKit/src/Messages/Attachments/TSAttachmentStream.m
index 64ee5b761..554ba88a2 100644
--- a/SignalServiceKit/src/Messages/Attachments/TSAttachmentStream.m
+++ b/SignalServiceKit/src/Messages/Attachments/TSAttachmentStream.m
@@ -381,7 +381,7 @@ typedef void (^OWSLoadedThumbnailSuccess)(OWSLoadedThumbnail *loadedThumbnail);
 
 - (BOOL)isValidVideo
 {
-    OWSAssertDebug(self.isImage || self.isAnimated);
+    OWSAssertDebug(self.isVideo);
 
     BOOL result;
     BOOL didUpdateCache = NO;