diff --git a/stages/admin.py b/stages/admin.py
index 26f960a..be66ea5 100644
--- a/stages/admin.py
+++ b/stages/admin.py
@@ -136,7 +136,7 @@ class AvailabilityAdminForm(forms.ModelForm):
                 comment=instance.comment)
         return instance
 
-class AvailabilityInline(admin.TabularInline):
+class AvailabilityInline(admin.StackedInline):
     model = Availability
     form = AvailabilityAdminForm
     ordering = ('corporation__name',)
@@ -155,7 +155,7 @@ class PeriodAdmin(admin.ModelAdmin):
 class AvailabilityAdmin(admin.ModelAdmin):
     list_display = ('corporation', 'period', 'domain')
     list_filter = ('period',)
-    fields = (('corporation', 'period'), 'domain', 'contact', 'comment')
+    fields = (('corporation', 'period'), 'domain', 'contact', 'priority', 'comment')
     form = AvailabilityAdminForm
 
     def formfield_for_foreignkey(self, db_field, request, **kwargs):
diff --git a/stages/models.py b/stages/models.py
index 916657c..aa9092e 100644
--- a/stages/models.py
+++ b/stages/models.py
@@ -218,6 +218,7 @@ class Availability(models.Model):
     period = models.ForeignKey(Period, verbose_name='Période')
     domain = models.ForeignKey(Domain, verbose_name='Domaine')
     contact = models.ForeignKey(CorpContact, null=True, blank=True, verbose_name='Contact institution')
+    priority = models.BooleanField('Prioritaire', default=False)
     comment = models.TextField(blank=True, verbose_name='Remarques')
 
     class Meta:
diff --git a/stages/static/js/attribution.js b/stages/static/js/attribution.js
index 7460c95..d6946ee 100644
--- a/stages/static/js/attribution.js
+++ b/stages/static/js/attribution.js
@@ -64,7 +64,9 @@ function update_corporations(period_id) {
     $.each(data, function() {
       if (this.free) {
         options.push(this);
-        sel.append($("<option />").val(this.id).text(this.corp_name).data('idCorp', this.id_corp));
+        var new_opt = $("<option />").val(this.id).text(this.corp_name).data('idCorp', this.id_corp);
+        if (this.priority) new_opt.addClass('priority');
+        sel.append(new_opt);
       }
       if ($.inArray(this.domain, domains) < 0) {
         domains.push(this.domain);
@@ -167,7 +169,9 @@ $(document).ready(function() {
     $.each(options, function(i) {
         var option = options[i];
         if (option.domain == filter_val || filter_val == '') {
-          sel.append($("<option />").val(option.id).text(option.corp_name));
+          var new_opt = $("<option />").val(option.id).text(option.corp_name);
+          if (option.priority) new_opt.addClass('priority');
+          sel.append(new_opt);
         }
     });
   });
diff --git a/stages/views.py b/stages/views.py
index 1450709..c1bf431 100644
--- a/stages/views.py
+++ b/stages/views.py
@@ -179,9 +179,11 @@ def period_students(request, pk):
 def period_availabilities(request, pk):
     """ Return all availabilities in the specified period """
     period = get_object_or_404(Period, pk=pk)
+    # Sorting by the boolean priority is first with PostgreSQL, last with SQLite :-/
     corps = [{'id': av.id, 'id_corp': av.corporation.id, 'corp_name': av.corporation.name,
-              'domain': av.domain.name, 'free': av.free}
-             for av in period.availability_set.select_related('corporation').all()]
+              'domain': av.domain.name, 'free': av.free, 'priority': av.priority}
+             for av in period.availability_set.select_related('corporation').all(
+                                             ).order_by('priority', 'corporation__name')]
     return HttpResponse(json.dumps(corps), content_type="application/json")
 
 def new_training(request):
diff --git a/templates/attribution.html b/templates/attribution.html
index d4a73c9..0fdbbf3 100644
--- a/templates/attribution.html
+++ b/templates/attribution.html
@@ -12,6 +12,7 @@
 
   div#corp_choice { float: right; width: 18%; }
   select#corp_select, select#corp_filter { width: 100%; height: auto; }
+  select#corp_select option.priority { font-weight: bold; }
 
   div#student_detail { float:left; width: 40%; margin: 1em; padding: 0.5em; border: 3px solid red; min-height: 4em; border-radius: 8px; }
   div#previous_stages { background-color: #EEE; border-radius: 4px; }