diff --git a/endpoints/comment/downvote-reply.php b/endpoints/comment/downvote-reply.php
index 541a0d9b..9637bdc3 100644
--- a/endpoints/comment/downvote-reply.php
+++ b/endpoints/comment/downvote-reply.php
@@ -47,7 +47,7 @@ class CommentDownvotereplyResponse extends TextResponse
             User::canSupervote() ? -2 : -1
         );
 
-        if (!$ok)
+        if (!is_int($ok))
         {
             trigger_error('CommentDownvotereplyResponse - write to db failed', E_USER_ERROR);
             $this->generate404(User::isInGroup(U_GROUP_STAFF) ? 'write to db failed' : '');
diff --git a/endpoints/comment/upvote-reply.php b/endpoints/comment/upvote-reply.php
index d40b5b75..91fedf47 100644
--- a/endpoints/comment/upvote-reply.php
+++ b/endpoints/comment/upvote-reply.php
@@ -47,7 +47,7 @@ class CommentUpvotereplyResponse extends TextResponse
             User::canSupervote() ? 2 : 1
         );
 
-        if (!$ok)
+        if (!is_int($ok))
         {
             trigger_error('CommentUpvotereplyResponse - write to db failed', E_USER_ERROR);
             $this->generate404(User::isInGroup(U_GROUP_STAFF) ? 'write to db failed' : '');