diff --git a/categories/delete_category.html b/categories/delete_category.html
index 203bb60..7430344 100644
--- a/categories/delete_category.html
+++ b/categories/delete_category.html
@@ -7,7 +7,7 @@
 
 {{#form on="delete"}}
 	{{* Vérifier s'il reste des matériels dans cette catégorie *}}
-	{{#load type="equipment" category=$_GET.key assign="equipment"}}
+	{{#load type="equipment" category=$_GET.key limit="1"}}
 		{{:redirect force="./index.html?err=1&msg=suppression"}}
 	{{else}}
 		{{* supprimer la catégorie sélectionnée*}}
diff --git a/categories/index.html b/categories/index.html
index aac2a00..0eb43d0 100644
--- a/categories/index.html
+++ b/categories/index.html
@@ -27,15 +27,17 @@
 		{{:assign category_key=$key}}
 		{{* voir s'il y a des matériels dans cette catégorie *}}
 		{{:assign materiel_present=true}}
-		{{#load type="equipment"  where="$$.category = :category_key" :category_key=$category_key}}
+		{{#load type="equipment" where="$$.category = :category_key" :category_key=$category_key limit=1}}
 		{{else}}
 			{{:assign materiel_present=false}}
 		{{/load}}
 		<tr>
 			<th>{{$name}}</th>
 			<td class="actions">
+				{{if ! $materiel_present}}
+					{{:linkbutton label="Supprimer" href="delete_category.html?key=%s"|args:$key shape="delete" target="_dialog"}}
+				{{/if}}
 				{{:linkbutton label="Modifier" href="modify_category.html?key=%s"|args:$key shape="edit" target="_dialog"}}
-				{{:linkbutton label="Supprimer" href="delete_category.html?key=%s"|args:$key shape="delete" target="_dialog"}}
 			</td>
 		</tr>
 	{{else}}
diff --git a/equipment_history.html b/equipment_history.html
index ecf5a97..3ce6424 100644
--- a/equipment_history.html
+++ b/equipment_history.html
@@ -193,7 +193,7 @@
 			<tr>
 				<td>{{$date|date_short}}</td>
 				<td>{{$col2}}</td>
-				<td>{{$op_label}}</td>
+				<td class="nosort">{{$op_label}}</td>
 				<td class="num">{{$amount}}</td>
 				<td class="num nosort">{{$stock}}</td>
 				<td class="num nosort">{{$exterieur}}</td>
@@ -291,7 +291,7 @@
 			<tr>
 				<td>{{$date|date_short}}</td>
 				<td>{{$col2}}</td>
-				<td>{{$op_label}}</td>
+				<td class="nosort">{{$op_label}}</td>
 				<td class="num">{{$amount}}</td>
 				<td class="num nosort">{{$stock}}</td>
 				<td>{{$col6}}</td>
diff --git a/style.css b/style.css
index 2193b11..39ae075 100644
--- a/style.css
+++ b/style.css
@@ -21,6 +21,6 @@
 }
 
 /* désactiver rétroaction pour colonnes non triables */
-table.list > thead td[class~=nosort] a:hover {
+table.list > thead th[class~=nosort] a:hover {
 	background-color : rgba(var(--gSecondColor), 0.);
 }