diff --git a/src/msw/metafile.cpp b/src/msw/metafile.cpp
index 33f1798b4f..681c8d3a56 100644
--- a/src/msw/metafile.cpp
+++ b/src/msw/metafile.cpp
@@ -382,7 +382,7 @@ bool wxMakeMetafilePlaceable(const wxString& filename, int x1, int y1, int x2, i
 
     wxChar tempFileBuf[256];
     wxGetTempFileName(wxT("mf"), tempFileBuf);
-    FILE *fHandle = wxFopen(wxConvFile.cWX2MB(tempFileBuf), _T("wb"));
+    FILE *fHandle = wxFopen(wxFNCONV(wxConvFile), _T("wb"));
     if (!fHandle)
         return FALSE;
     fwrite((void *)&header, sizeof(unsigned char), sizeof(mfPLACEABLEHEADER), fHandle);