diff --git a/src/common/fs_inet.cpp b/src/common/fs_inet.cpp
index 3af1151d62..f471a5bf83 100644
--- a/src/common/fs_inet.cpp
+++ b/src/common/fs_inet.cpp
@@ -98,7 +98,7 @@ wxFSFile* wxInternetFSHandler::OpenFile(wxFileSystem& WXUNUSED(fs), const wxStri
             m_Cache.Put(right, info);
 
             {   // ok, now copy it:
-                wxFileOutputStream sout(wxString(buf));
+                wxFileOutputStream sout((wxString)buf);
                 s -> Read(sout); // copy the stream
             }
             delete s;