diff --git a/ruby/lib/jam_ruby/models/band.rb b/ruby/lib/jam_ruby/models/band.rb
index eeb71ad59..c8c328f5e 100644
--- a/ruby/lib/jam_ruby/models/band.rb
+++ b/ruby/lib/jam_ruby/models/band.rb
@@ -31,8 +31,8 @@ module JamRuby
     has_many :musician_instruments, :class_name => "JamRuby::MusicianInstrument", :foreign_key=> 'player_id'
     has_many :instruments, :through => :musician_instruments, :class_name => "JamRuby::Instrument", :foreign_key=> 'player_id'
 
-    has_many :online_presences, :class_name => "JamRuby::OnlinePresence"
-    has_many :performance_samples, :class_name => "JamRuby::PerformanceSample"
+    has_many :online_presences, :class_name => "JamRuby::OnlinePresence", :foreign_key=> 'player_id'
+    has_many :performance_samples, :class_name => "JamRuby::PerformanceSample", :foreign_key=> 'player_id'
 
 
     # musicians