diff --git a/contrib/src/xml/xmlbinz.cpp b/contrib/src/xml/xmlbinz.cpp
index a65d81bd99..db42f205ca 100644
--- a/contrib/src/xml/xmlbinz.cpp
+++ b/contrib/src/xml/xmlbinz.cpp
@@ -52,7 +52,7 @@ bool wxXmlIOHandlerBinZ::Load(wxInputStream& stream, wxXmlDocument& doc)
 {
     ReadHeader(stream);
     wxZlibInputStream costr(stream);
-    return wxXmlIOHandlerBin::Load(stream, doc);
+    return wxXmlIOHandlerBin::Load(costr, doc);
 }