diff --git a/CHANGELOG.md b/CHANGELOG.md
index a353146a..3994c494 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,7 @@ CHANGELOG for FlatCAM beta
 
 - in Extract Plugin some minor UI changes
 - in Film Plugin added new parameters and improvements: now the negative film can have a box that is convex and it is no longer limited to square shapes. Also, if the box object has only one geometric element (an outline) then that one will be the final shape of the negative
+- in Gerber Editor fixed not being able to delete an aperture
 
 21.09.2021
 
diff --git a/appEditors/AppGerberEditor.py b/appEditors/AppGerberEditor.py
index 6ae87dcf..2a6652a3 100644
--- a/appEditors/AppGerberEditor.py
+++ b/appEditors/AppGerberEditor.py
@@ -917,7 +917,7 @@ class PoligonizeEditorGrb(ShapeToolEditorGrb):
                     except KeyError:
                         self.draw_app.on_aperture_add(apcode=0)
                         current_storage = self.draw_app.storage_dict[0]['geometry']
-                new_el = {'solid': geo, 'follow': geo.exterior}
+                new_el = {'solid': geo, 'follow': LineString(geo.exterior)}
                 self.draw_app.on_grb_shape_complete(current_storage, specific_shape=DrawToolShape(deepcopy(new_el)))
         else:
             # clean-up the geo
@@ -930,7 +930,7 @@ class PoligonizeEditorGrb(ShapeToolEditorGrb):
                     self.draw_app.on_aperture_add(apcode=0)
                     current_storage = self.draw_app.storage_dict[0]['geometry']
 
-            new_el = {'solid': fused_geo, 'follow': fused_geo.exterior}
+            new_el = {'solid': fused_geo, 'follow': LineString(fused_geo.exterior)}
             self.draw_app.on_grb_shape_complete(current_storage, specific_shape=DrawToolShape(deepcopy(new_el)))
 
         self.draw_app.delete_selected()
@@ -3847,7 +3847,7 @@ class AppGerberEditor(QtCore.QObject):
                 deleted_apcode_list = []
                 for index in self.ui.apertures_table.selectionModel().selectedRows():
                     row = index.row()
-                    deleted_apcode_list.append(self.ui.apertures_table.item(row, 1).text())
+                    deleted_apcode_list.append(int(self.ui.apertures_table.item(row, 1).text()))
         except Exception as exc:
             self.app.inform.emit('[WARNING_NOTCL] %s %s' % (_("Select an aperture in Aperture Table -->"), str(exc)))
             return
@@ -3863,7 +3863,10 @@ class AppGerberEditor(QtCore.QObject):
                         self.tid2apcode.pop(deleted_tool, None)
 
                 self.oldapcode_newapcode.pop(deleted_aperture, None)
-                self.app.inform.emit('[success] %s: %s' % (_("Deleted aperture with code"), str(deleted_aperture)))
+                if deleted_aperture not in self.storage_dict:
+                    self.app.inform.emit('[success] %s: %s' % (_("Deleted aperture with code"), str(deleted_aperture)))
+                else:
+                    self.app.inform.emit('[ERROR_NOTCL] %s %s' % (_("Failed."), str(deleted_aperture)))
 
         self.plot_all()
         self.build_ui()