diff --git a/_nav.html b/_nav.html
index 060d6b3..007a7a8 100644
--- a/_nav.html
+++ b/_nav.html
@@ -1,7 +1,13 @@
+{{* -*- brindille -*- *}}
+
 <nav class="tabs">
 	{{if $current == 'inventaire'}}
 		<aside>
-			{{:linkbutton label="Ajouter un nouveau matériel" shape="plus" href="mouvements/ajouter_entree.html" target="_dialog"}}
+			{{if $cat == null || $cat == 0}}
+				{{:linkbutton label="Ajouter une catégorie" shape="plus" href="categories/add_category.html" target="_dialog"}}
+			{{else}}
+				{{:linkbutton label="Ajouter un nouveau matériel" shape="plus" href="mouvements/ajouter_entree.html" target="_dialog"}}
+			{{/if}}
 		</aside>
 	{{/if}}
 
diff --git a/index.html b/index.html
index 7b096c1..799aa05 100644
--- a/index.html
+++ b/index.html
@@ -8,7 +8,9 @@
 {{else}}
 	{{:assign proprio="nonproprio"}}
 {{/if}}
-{{:include file="_nav.html" current="inventaire" subcurrent="%s"|args:$proprio}}
+
+{{#load type="category" count=true assign="result"}}{{/load}}
+{{:include file="_nav.html" current="inventaire" cat="%d"|args:$result.count subcurrent="%s"|args:$proprio}}
 
 {{if $_GET.ok}}
 	{{if $_GET.msg == "ajout" }}
@@ -22,8 +24,6 @@
 	<p class="block error">Modification refusée</p>
 {{/if}}
 
-{{#load type="category" count=true assign="result"}}{{/load}}
-
 {{if $result.count == 0}}
 	<p class="block alert">Il n'y a aucune catégorie : vous devez en ajouter.</p>
 {{else}}