diff --git a/Source/DialogTemplate.cpp b/Source/DialogTemplate.cpp
index f560d992..927bb3ff 100644
--- a/Source/DialogTemplate.cpp
+++ b/Source/DialogTemplate.cpp
@@ -432,7 +432,6 @@ void CDialogTemplate::CTrimToString(WORD id, TCHAR *str, int margins) {
 }
 #else //! WIN32
 void CDialogTemplate::PixelsToDlgUnits(short& x, short& y) { assert(0); }
-void CDialogTemplate::PixelsToDlgUnits(SIZE& siz) { assert(0); }
 void CDialogTemplate::DlgUnitsToPixels(short& x, short& y) { assert(0); }
 #endif //~ WIN32
 
diff --git a/Source/DialogTemplate.h b/Source/DialogTemplate.h
index 15d9fe5d..1b023cc6 100644
--- a/Source/DialogTemplate.h
+++ b/Source/DialogTemplate.h
@@ -124,10 +124,10 @@ public:
   void  MoveAll(short x, short y);
   void  Resize(short x, short y);
   void  PixelsToDlgUnits(short& x, short& y);
-  void  PixelsToDlgUnits(SIZE& siz);
   void  DlgUnitsToPixels(short& x, short& y);
 #ifdef _WIN32
   static inline bool SupportsDialogUnitComputation() { return true; }
+  void  PixelsToDlgUnits(SIZE& siz);
   SIZE  GetStringSize(WORD id, TCHAR *str);
   void  RTrimToString(WORD id, TCHAR *str, int margins);
   void  LTrimToString(WORD id, TCHAR *str, int margins);