diff --git a/app/models/fixed_deliverable.rb b/app/models/fixed_deliverable.rb
index 1ec556d..21b2644 100644
--- a/app/models/fixed_deliverable.rb
+++ b/app/models/fixed_deliverable.rb
@@ -16,10 +16,10 @@ class FixedDeliverable < Deliverable
     
     # Get all timelogs assigned
     time_logs = self.issues.collect(&:time_entries).flatten
-    
+
     # Find each Member for their rate
     time_logs.each do |time_log|
-      rate = Rate.amount_for(time_log.user, time_log.project, time_log.spent_on)
+      rate = Rate.amount_for(time_log.user, time_log.project, time_log.spent_on.to_s)
       total += (rate * time_log.hours) unless rate.nil?
     end
     
diff --git a/app/models/hourly_deliverable.rb b/app/models/hourly_deliverable.rb
index ee88b8b..3921f36 100644
--- a/app/models/hourly_deliverable.rb
+++ b/app/models/hourly_deliverable.rb
@@ -9,10 +9,10 @@ class HourlyDeliverable < Deliverable
     
     # Get all timelogs assigned
     time_logs = self.issues.collect(&:time_entries).flatten
-    
+
     # Find each Member for their rate
     time_logs.each do |time_log|
-      rate = Rate.amount_for(time_log.user, time_log.project, time_log.spent_on)
+      rate = Rate.amount_for(time_log.user, time_log.project, time_log.spent_on.to_s)
       total += (rate * time_log.hours) unless rate.nil?
     end
     
diff --git a/spec/models/fixed_deliverable_spec.rb b/spec/models/fixed_deliverable_spec.rb
index 7d5407b..e9952b8 100644
--- a/spec/models/fixed_deliverable_spec.rb
+++ b/spec/models/fixed_deliverable_spec.rb
@@ -28,7 +28,7 @@ describe FixedDeliverable, '.spent' do
     @issue_1_time_entry = mock_model(TimeEntry, :issue_id => @issue1.id, :user => @user, :project => @project, :hours => 1.0, :spent_on => Date.today)
     @issue1.stub!(:time_entries).and_return([@issue_1_time_entry])
     
-    Rate.should_receive(:amount_for).with(@user, @project, @issue_1_time_entry.spent_on).and_return(60.0)
+    Rate.should_receive(:amount_for).with(@user, @project, @issue_1_time_entry.spent_on.to_s).and_return(60.0)
     
     @deliverable = FixedDeliverable.new({ :subject => 'test' })
     @issues = [@issue1]
diff --git a/spec/models/hourly_deliverable_spec.rb b/spec/models/hourly_deliverable_spec.rb
index a04a729..662f764 100644
--- a/spec/models/hourly_deliverable_spec.rb
+++ b/spec/models/hourly_deliverable_spec.rb
@@ -16,7 +16,7 @@ describe HourlyDeliverable, '.spent' do
     @issue_1_time_entry = mock_model(TimeEntry, :issue_id => @issue1.id, :user => @user, :project => @project, :hours => 1.0, :spent_on => Date.today)
     @issue1.stub!(:time_entries).and_return([@issue_1_time_entry])
     
-    Rate.should_receive(:amount_for).with(@user, @project, @issue_1_time_entry.spent_on).and_return(60.0)
+    Rate.should_receive(:amount_for).with(@user, @project, @issue_1_time_entry.spent_on.to_s).and_return(60.0)
 
     @deliverable = HourlyDeliverable.new({ :subject => 'test' })
     @issues = [@issue1]