diff --git a/mainscripts/MaskEditorTool.py b/mainscripts/MaskEditorTool.py
index 6a97a26..9c48a7a 100644
--- a/mainscripts/MaskEditorTool.py
+++ b/mainscripts/MaskEditorTool.py
@@ -458,13 +458,12 @@ def mask_editor_main(input_dir, confirmed_dir=None, skipped_dir=None):
                                     ed.redo_point()
 
                 for key, chr_key, ctrl_pressed, alt_pressed, shift_pressed in io.get_key_events(wnd_name):
-
                     if chr_key == 'q' or chr_key == 'z':
                         do_prev_count = 1 if not shift_pressed else 10
                     elif chr_key == '-':
                         zoom_factor = np.clip (zoom_factor-0.1, 0.1, 4.0)
                         ed.set_screen_changed()
-                    elif chr_key == '=':
+                    elif chr_key == '+':
                         zoom_factor = np.clip (zoom_factor+0.1, 0.1, 4.0)
                         ed.set_screen_changed()
                     elif key == 27: #esc