diff --git a/Kinza/lib/Kinza/Schema/Result/Presentation.pm b/Kinza/lib/Kinza/Schema/Result/Presentation.pm
index d354c1a..2e7d923 100644
--- a/Kinza/lib/Kinza/Schema/Result/Presentation.pm
+++ b/Kinza/lib/Kinza/Schema/Result/Presentation.pm
@@ -149,7 +149,7 @@ __PACKAGE__->many_to_many(
 sub spaces {
   my $self = shift;
 
-  return $self->course->capacity - $self->attendances->count;
+  return $self->course->capacity - $self->number;
 }
 
 sub available {
@@ -164,6 +164,11 @@ sub full {
   return ! $self->available;
 }
 
+sub number {
+  my $self = shift;
+
+  return $self->attendances->count;
+}
 
 # You can replace this text with custom code or comments, and it will be preserved on regeneration
 __PACKAGE__->meta->make_immutable;
diff --git a/Kinza/views/courses.tt b/Kinza/views/courses.tt
index ffa97d0..ae36b8c 100644
--- a/Kinza/views/courses.tt
+++ b/Kinza/views/courses.tt
@@ -16,7 +16,7 @@
    FOREACH term IN terms.all.sort('seq');
      pres = course.in_term(term.id);
      IF pres;
-       course_terms.push(term.name _ ' (' _ (pres.attendances.count || 0) _ ')');
+       course_terms.push(term.name _ ' (' _ (pres.number || 0) _ ')');
      END;
    END -%]
 <td>[% course_terms.join('<br>') %]</td></tr>