diff --git a/include/wx/rawbmp.h b/include/wx/rawbmp.h
index 627961d149..568fd7c667 100644
--- a/include/wx/rawbmp.h
+++ b/include/wx/rawbmp.h
@@ -636,7 +636,9 @@ class wxPixelData :
     public wxPixelDataOut<Image>::template wxPixelDataIn<PixelFormat>
 {
 public:
-    typedef wxPixelDataOut<Image>::template wxPixelDataIn<PixelFormat> Base;
+    typedef
+        typename wxPixelDataOut<Image>::template wxPixelDataIn<PixelFormat>
+        Base;
 
     wxPixelData(Image& image) : Base(image) { }