diff --git a/src/slic3r/GUI/ImageGrid.cpp b/src/slic3r/GUI/ImageGrid.cpp
index 67f436229..7812ed6b1 100644
--- a/src/slic3r/GUI/ImageGrid.cpp
+++ b/src/slic3r/GUI/ImageGrid.cpp
@@ -370,7 +370,7 @@ void ImageGrid::resize(wxSizeEvent& event)
 
 void ImageGrid::mouseWheelMoved(wxMouseEvent &event)
 {
-    auto delta = (event.GetWheelRotation() < 0 == event.IsWheelInverted()) ? -1 : 1;
+    auto delta = event.GetWheelRotation() < 0 ? 1 : -1;
     int off = m_row_offset + delta;
     if (off >= 0 && off < m_row_count) {
         m_row_offset = off;
diff --git a/src/slic3r/GUI/Widgets/ComboBox.cpp b/src/slic3r/GUI/Widgets/ComboBox.cpp
index 01d7d9614..0b36f85e7 100644
--- a/src/slic3r/GUI/Widgets/ComboBox.cpp
+++ b/src/slic3r/GUI/Widgets/ComboBox.cpp
@@ -222,7 +222,7 @@ void ComboBox::mouseWheelMoved(wxMouseEvent &event)
 {
     event.Skip();
     if (drop_down) return;
-    auto delta = (event.GetWheelRotation() < 0 == event.IsWheelInverted()) ? -1 : 1;
+    auto delta = event.GetWheelRotation() < 0 ? 1 : -1;
     unsigned int n = GetSelection() + delta;
     if (n < GetCount()) {
         SetSelection((int) n);
diff --git a/src/slic3r/GUI/Widgets/SpinInput.cpp b/src/slic3r/GUI/Widgets/SpinInput.cpp
index 9bea97dcd..d4b03795b 100644
--- a/src/slic3r/GUI/Widgets/SpinInput.cpp
+++ b/src/slic3r/GUI/Widgets/SpinInput.cpp
@@ -288,7 +288,7 @@ void SpinInput::onTextEnter(wxCommandEvent &event)
 
 void SpinInput::mouseWheelMoved(wxMouseEvent &event)
 {
-    auto delta = (event.GetWheelRotation() < 0 == event.IsWheelInverted()) ? 1 : -1;
+    auto delta = event.GetWheelRotation() < 0 ? 1 : -1;
     SetValue(val + delta);
     sendSpinEvent();
     text_ctrl->SetFocus();