diff --git a/include/wx/bmpbndl.h b/include/wx/bmpbndl.h
index b8e140d0d0..7b60fd9d18 100644
--- a/include/wx/bmpbndl.h
+++ b/include/wx/bmpbndl.h
@@ -162,12 +162,12 @@ public:
     wxNODISCARD static wxSize
     GetConsensusSizeFor(double scale, const wxVector<wxBitmapBundle>& bundles);
     wxNODISCARD static wxSize
-    GetConsensusSizeFor(wxWindow* win, const wxVector<wxBitmapBundle>& bundles);
+    GetConsensusSizeFor(const wxWindow* win, const wxVector<wxBitmapBundle>& bundles);
 
     // Create wxImageList and fill it with the images from the given bundles in
     // the sizes appropriate for the DPI scaling used for the specified window.
     wxNODISCARD static wxImageList*
-    CreateImageList(wxWindow* win, const wxVector<wxBitmapBundle>& bundles);
+    CreateImageList(const wxWindow* win, const wxVector<wxBitmapBundle>& bundles);
 
 private:
     typedef wxObjectDataPtr<wxBitmapBundleImpl> wxBitmapBundleImplPtr;
diff --git a/src/common/bmpbndl.cpp b/src/common/bmpbndl.cpp
index fbe985c45b..af1e419cc3 100644
--- a/src/common/bmpbndl.cpp
+++ b/src/common/bmpbndl.cpp
@@ -619,7 +619,7 @@ void RecordSizePref(SizePrefs& prefs, const wxSize& size)
 
 /* static */
 wxSize
-wxBitmapBundle::GetConsensusSizeFor(wxWindow* win,
+wxBitmapBundle::GetConsensusSizeFor(const wxWindow* win,
                                     const wxVector<wxBitmapBundle>& bundles)
 {
     return GetConsensusSizeFor(win->GetDPIScaleFactor(), bundles);
@@ -669,7 +669,7 @@ wxBitmapBundle::GetConsensusSizeFor(double scale,
 
 /* static */
 wxImageList*
-wxBitmapBundle::CreateImageList(wxWindow* win,
+wxBitmapBundle::CreateImageList(const wxWindow* win,
                                 const wxVector<wxBitmapBundle>& bundles)
 {
     wxCHECK_MSG( win, nullptr, "must have a valid window" );