diff --git a/utils/wxrc/wxrc.cpp b/utils/wxrc/wxrc.cpp
index d54dab604e..9597c6e2d8 100644
--- a/utils/wxrc/wxrc.cpp
+++ b/utils/wxrc/wxrc.cpp
@@ -707,16 +707,17 @@ void XmlResApp::MakePackageCPP(const wxArrayString& flist)
 
 void XmlResApp::GenCPPHeader()
 {
-    wxString fileSpec = ((parOutput.BeforeLast('.')).AfterLast('/')).AfterLast('\\');
-    wxString heaFileName = fileSpec + wxT(".h");
+    // Generate the output header in the same directory as the source file.
+    wxFileName headerName(parOutput);
+    headerName.SetExt("h");
 
-    wxFFile file(heaFileName, wxT("wt"));
+    wxFFile file(headerName.GetFullPath(), wxT("wt"));
     file.Write(
 "//\n"
 "// This file was automatically generated by wxrc, do not edit by hand.\n"
 "//\n\n"
-"#ifndef __"  + fileSpec + "_h__\n"
-"#define __"  + fileSpec + "_h__\n"
+"#ifndef __"  + headerName.GetName() + "_h__\n"
+"#define __"  + headerName.GetName() + "_h__\n"
 );
     for(size_t i=0;i<aXRCWndClassData.GetCount();++i){
                 aXRCWndClassData.Item(i).GenerateHeaderCode(file);