diff --git a/include/wx/bitmap.h b/include/wx/bitmap.h
index f861b3354a..754eabc631 100644
--- a/include/wx/bitmap.h
+++ b/include/wx/bitmap.h
@@ -19,11 +19,11 @@
 #include "wx/string.h"
 #include "wx/gdicmn.h"  // for wxBitmapType
 #include "wx/colour.h"
+#include "wx/image.h"
 
 class WXDLLIMPEXP_FWD_CORE wxBitmap;
 class WXDLLIMPEXP_FWD_CORE wxBitmapHandler;
 class WXDLLIMPEXP_FWD_CORE wxIcon;
-class WXDLLIMPEXP_FWD_CORE wxImage;
 class WXDLLIMPEXP_FWD_CORE wxMask;
 class WXDLLIMPEXP_FWD_CORE wxPalette;
 
@@ -168,6 +168,9 @@ public:
 
 #if wxUSE_IMAGE
     virtual wxImage ConvertToImage() const = 0;
+
+    // Convert to disabled (dimmed) bitmap.
+    wxBitmap ConvertToDisabled(unsigned char brightness = 255) const;
 #endif // wxUSE_IMAGE
 
     virtual wxMask *GetMask() const = 0;
@@ -175,9 +178,6 @@ public:
 
     virtual wxBitmap GetSubBitmap(const wxRect& rect) const = 0;
 
-    // Convert to disabled (dimmed) bitmap.
-    wxBitmap ConvertToDisabled(unsigned char brightness = 255) const;
-
     virtual bool SaveFile(const wxString &name, wxBitmapType type,
                           const wxPalette *palette = NULL) const = 0;
     virtual bool LoadFile(const wxString &name, wxBitmapType type) = 0;
@@ -272,6 +272,20 @@ protected:
     #include "wx/os2/bitmap.h"
 #endif
 
+#if wxUSE_IMAGE
+inline
+wxBitmap
+#if wxUSE_BITMAP_BASE
+wxBitmapBase::
+#else
+wxBitmap::
+#endif
+ConvertToDisabled(unsigned char brightness) const
+{
+    return ConvertToImage().ConvertToDisabled(brightness);
+}
+#endif // wxUSE_IMAGE
+
 // we must include generic mask.h after wxBitmap definition
 #if defined(__WXMGL__) || defined(__WXDFB__)
     #define wxUSE_GENERIC_MASK 1
diff --git a/include/wx/msw/bitmap.h b/include/wx/msw/bitmap.h
index 205370f459..ce3e841aee 100644
--- a/include/wx/msw/bitmap.h
+++ b/include/wx/msw/bitmap.h
@@ -25,7 +25,6 @@ class WXDLLIMPEXP_FWD_CORE wxDC;
 class WXDLLIMPEXP_FWD_CORE wxDIB;
 #endif
 class WXDLLIMPEXP_FWD_CORE wxIcon;
-class WXDLLIMPEXP_FWD_CORE wxImage;
 class WXDLLIMPEXP_FWD_CORE wxMask;
 class WXDLLIMPEXP_FWD_CORE wxPalette;
 class WXDLLIMPEXP_FWD_CORE wxPixelDataBase;
@@ -115,6 +114,7 @@ public:
 
 #if wxUSE_IMAGE
     wxImage ConvertToImage() const;
+    wxBitmap ConvertToDisabled(unsigned char brightness = 255) const;
 #endif // wxUSE_IMAGE
 
     // get the given part of bitmap
diff --git a/include/wx/os2/bitmap.h b/include/wx/os2/bitmap.h
index 818bb49071..653dd9635a 100644
--- a/include/wx/os2/bitmap.h
+++ b/include/wx/os2/bitmap.h
@@ -25,7 +25,6 @@ class WXDLLIMPEXP_FWD_CORE wxIcon;
 class WXDLLIMPEXP_FWD_CORE wxMask;
 class WXDLLIMPEXP_FWD_CORE wxCursor;
 class WXDLLIMPEXP_FWD_CORE wxControl;
-class WXDLLIMPEXP_FWD_CORE wxImage;
 class WXDLLIMPEXP_FWD_CORE wxPixelDataBase;
 
 // ----------------------------------------------------------------------------
@@ -149,6 +148,7 @@ public:
     virtual ~wxBitmap();
 
     wxImage ConvertToImage() const;
+    wxBitmap ConvertToDisabled(unsigned char brightness = 255) const;
 
     // get the given part of bitmap
     wxBitmap GetSubBitmap(const wxRect& rRect) const;
diff --git a/include/wx/palmos/bitmap.h b/include/wx/palmos/bitmap.h
index e31cf24ce0..4ef6b5dd56 100644
--- a/include/wx/palmos/bitmap.h
+++ b/include/wx/palmos/bitmap.h
@@ -96,6 +96,7 @@ public:
 
 #if wxUSE_IMAGE && wxUSE_WXDIB
     wxImage ConvertToImage() const;
+    wxBitmap ConvertToDisabled(unsigned char brightness = 255) const;
 #endif // wxUSE_IMAGE
 
     // get the given part of bitmap
diff --git a/interface/wx/bitmap.h b/interface/wx/bitmap.h
index 2a2d6b5cb8..94b8843668 100644
--- a/interface/wx/bitmap.h
+++ b/interface/wx/bitmap.h
@@ -508,6 +508,9 @@ public:
 
     /**
         Returns disabled (dimmed) version of the bitmap.
+
+        This method is not available when <code>wxUSE_IMAGE == 0</code>.
+
         @since 2.9.0
     */
     wxBitmap ConvertToDisabled(unsigned char brightness = 255) const;
diff --git a/src/common/bmpbase.cpp b/src/common/bmpbase.cpp
index eebf56e5f9..e80091dada 100644
--- a/src/common/bmpbase.cpp
+++ b/src/common/bmpbase.cpp
@@ -135,16 +135,6 @@ public:
     void OnExit() { wxBitmap::CleanUpHandlers(); }
 };
 
-wxBitmap wxBitmapBase::ConvertToDisabled(unsigned char brightness) const
-{
-    wxBitmap bmp;
-#if wxUSE_IMAGE
-    wxImage image = ConvertToImage();
-    bmp = wxBitmap(image.ConvertToDisabled(brightness));
-#endif
-    return bmp;
-}
-
 IMPLEMENT_DYNAMIC_CLASS(wxBitmapBaseModule, wxModule)
 
 #endif // wxUSE_BITMAP_BASE