diff -urN simple-scan-3.25.1.old/src/ui.vala simple-scan-3.25.1/src/ui.vala
--- simple-scan-3.25.1.old/src/ui.vala	2017-04-25 04:10:18.000000000 +0100
+++ simple-scan-3.25.1/src/ui.vala	2017-04-25 13:38:49.425811115 +0100
@@ -467,7 +467,7 @@
                 for (i = 0; i < n_delete; i++)
                 {
                     device_model.iter_nth_child (out iter, null, index);
-                    device_model.remove (iter);
+                    device_model.remove (ref iter);
                 }
             }
             else
@@ -480,7 +480,7 @@
 
         /* Remove any remaining devices */
         while (device_model.iter_nth_child (out iter, null, index))
-            device_model.remove (iter);
+            device_model.remove (ref iter);
 
         /* Select the previously selected device or the first available device */
         if (!have_selection)