diff --git a/src/slic3r/GUI/Widgets/TabCtrl.cpp b/src/slic3r/GUI/Widgets/TabCtrl.cpp
index 27924574e..9ac68f2cb 100644
--- a/src/slic3r/GUI/Widgets/TabCtrl.cpp
+++ b/src/slic3r/GUI/Widgets/TabCtrl.cpp
@@ -108,7 +108,7 @@ int TabCtrl::AppendItem(const wxString &item,
     btns.push_back(btn);
     if (btns.size() > 1)
         sizer->GetItem(sizer->GetItemCount() - 1)->SetMinSize({0, 0});
-    sizer->Add(btn, 0, wxALIGN_CENTER_VERTICAL | wxALL, TAB_BUTTON_SPACE * 2);
+    sizer->Add(btn, 0, wxALIGN_CENTER_VERTICAL | wxALL, TAB_BUTTON_SPACE);
     sizer->AddStretchSpacer(1);
     relayout();
     return btns.size() - 1;
@@ -198,8 +198,9 @@ bool TabCtrl::IsVisible(unsigned int item) const
 
 void TabCtrl::DoSetSize(int x, int y, int width, int height, int sizeFlags)
 {
+    auto size = GetSize();
     wxWindow::DoSetSize(x, y, width, height, sizeFlags);
-    if (sizeFlags & wxSIZE_USE_EXISTING) return;
+    if (size == GetSize()) return;
     relayout();
 }
 
diff --git a/src/slic3r/GUI/wxMediaCtrl3.cpp b/src/slic3r/GUI/wxMediaCtrl3.cpp
index b2a97b19e..cee4df729 100644
--- a/src/slic3r/GUI/wxMediaCtrl3.cpp
+++ b/src/slic3r/GUI/wxMediaCtrl3.cpp
@@ -149,7 +149,7 @@ void wxMediaCtrl3::paintEvent(wxPaintEvent &evt)
 void wxMediaCtrl3::DoSetSize(int x, int y, int width, int height, int sizeFlags)
 {
     wxWindow::DoSetSize(x, y, width, height, sizeFlags);
-    if (sizeFlags & wxSIZE_USE_EXISTING) return;
+    if (sizeFlags == wxSIZE_USE_EXISTING) return;
     wxMediaCtrl_OnSize(this, m_video_size, width, height);
     std::unique_lock<std::mutex> lk(m_mutex);
     adjust_frame_size(m_frame_size, m_video_size, GetSize());