diff --git a/app/models/post_flag.rb b/app/models/post_flag.rb
index 800d8c988..e125d0bb2 100644
--- a/app/models/post_flag.rb
+++ b/app/models/post_flag.rb
@@ -68,6 +68,9 @@ class PostFlag < ActiveRecord::Base
     if post.is_deleted?
       errors[:post] << "is deleted"
       false
+    elsif post.is_pending?
+      errors[:post] << "is pending"
+      false
     else
       true
     end