diff --git a/app/models/user.rb b/app/models/user.rb
index 9cbb5eaae69..c89e5dd69c3 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -160,7 +160,7 @@ class User < ActiveRecord::Base
   scope :activated, -> { where(active: true) }
 
   scope :filter_by_username, ->(filter) do
-    where('username_lower ILIKE ?', filter)
+    where('username_lower ILIKE ?', "%#{filter}%")
   end
 
   scope :filter_by_username_or_email, ->(filter) do