diff --git a/app/models/user.rb b/app/models/user.rb
index 6fbaafdb00..564384f96e 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -101,6 +101,7 @@ def for_conference conference
             presence:   true
 
   validate :biography_limit
+  validates :affiliation, length: { maximum: 150 }
 
   DISTRIBUTION_COLORS = {
     'Active'      => 'green',