diff --git a/assets/src/css/style.css b/assets/src/css/style.css
index 772b14fac..e826a0310 100755
--- a/assets/src/css/style.css
+++ b/assets/src/css/style.css
@@ -311,10 +311,6 @@ span.form-control {
     padding: 5px;
 }
 
-.input-group .input-group-addon {
-    background-color: transparent;
-}
-
 .input-group-addon {
     padding: 3px 12px;
 }
diff --git a/plugins/statistiche_anagrafiche/edit.php b/plugins/statistiche_anagrafiche/edit.php
index a801e8d8a..e89b0b788 100755
--- a/plugins/statistiche_anagrafiche/edit.php
+++ b/plugins/statistiche_anagrafiche/edit.php
@@ -31,8 +31,8 @@ echo '
             <button class="btn btn-warning btn-xs" onclick="add_calendar()">
                 <i class="fa fa-plus"></i> '.tr('Aggiungi periodo').'
             </button>
-            <button type="button" class="btn btn-card-tool" data-widget="collapse">
-                <i class="fa fa-minus"></i>
+            <button type="button" class="btn btn-card-tool" data-card-widget="collapse">
+                <i class="fa fa-plus"></i>
             </button>
         </div>
     </div>