diff --git a/lib/Slic3r/GUI.pm b/lib/Slic3r/GUI.pm
index 54a6aa243..189497b41 100644
--- a/lib/Slic3r/GUI.pm
+++ b/lib/Slic3r/GUI.pm
@@ -15,20 +15,20 @@ use Wx 0.9901 qw(:bitmap :dialog :frame :icon :id :misc :systemsettings :topleve
 use Wx::Event qw(EVT_CLOSE EVT_MENU);
 use base 'Wx::App';
 
-use constant MI_LOAD_CONF     =>  1;
-use constant MI_EXPORT_CONF   =>  2;
-use constant MI_QUICK_SLICE   =>  3;
-use constant MI_REPEAT_QUICK  =>  4;
-use constant MI_QUICK_SAVE_AS =>  5;
-use constant MI_SLICE_SVG     =>  6;
+use constant MI_LOAD_CONF     => &Wx::NewId;
+use constant MI_EXPORT_CONF   => &Wx::NewId;
+use constant MI_QUICK_SLICE   => &Wx::NewId;
+use constant MI_REPEAT_QUICK  => &Wx::NewId;
+use constant MI_QUICK_SAVE_AS => &Wx::NewId;
+use constant MI_SLICE_SVG     => &Wx::NewId;
 
-use constant MI_TAB_PLATER    =>  7;
-use constant MI_TAB_PRINT     =>  8;
-use constant MI_TAB_FILAMENT  =>  9;
-use constant MI_TAB_PRINTER   => 10;
+use constant MI_TAB_PLATER    => &Wx::NewId;
+use constant MI_TAB_PRINT     => &Wx::NewId;
+use constant MI_TAB_FILAMENT  => &Wx::NewId;
+use constant MI_TAB_PRINTER   => &Wx::NewId;
 
-use constant MI_CONF_WIZARD   => 11;
-use constant MI_WEBSITE       => 12;
+use constant MI_CONF_WIZARD   => &Wx::NewId;
+use constant MI_WEBSITE       => &Wx::NewId;
 
 our $datadir;
 our $Settings;
diff --git a/lib/Slic3r/GUI/Plater.pm b/lib/Slic3r/GUI/Plater.pm
index 05c1616dd..f197997c1 100644
--- a/lib/Slic3r/GUI/Plater.pm
+++ b/lib/Slic3r/GUI/Plater.pm
@@ -12,13 +12,13 @@ use Wx qw(:bitmap :brush :button :cursor :dialog :filedialog :font :keycode :ico
 use Wx::Event qw(EVT_BUTTON EVT_COMMAND EVT_KEY_DOWN EVT_LIST_ITEM_DESELECTED EVT_LIST_ITEM_SELECTED EVT_MOUSE_EVENTS EVT_PAINT EVT_TOOL);
 use base 'Wx::Panel';
 
-use constant TB_MORE    => 1;
-use constant TB_LESS    => 2;
-use constant TB_45CW    => 3;
-use constant TB_45CCW   => 4;
-use constant TB_ROTATE  => 5;
-use constant TB_SCALE   => 6;
-use constant TB_SPLIT   => 7;
+use constant TB_MORE    => &Wx::NewId;
+use constant TB_LESS    => &Wx::NewId;
+use constant TB_45CW    => &Wx::NewId;
+use constant TB_45CCW   => &Wx::NewId;
+use constant TB_ROTATE  => &Wx::NewId;
+use constant TB_SCALE   => &Wx::NewId;
+use constant TB_SPLIT   => &Wx::NewId;
 
 my $THUMBNAIL_DONE_EVENT    : shared = Wx::NewEventType;
 my $PROGRESS_BAR_EVENT      : shared = Wx::NewEventType;