diff --git a/samples/exec/exec.cpp b/samples/exec/exec.cpp
index f0f1a4aa2b..80d4e1369f 100644
--- a/samples/exec/exec.cpp
+++ b/samples/exec/exec.cpp
@@ -817,7 +817,7 @@ void MyFrame::OnFileExec(wxCommandEvent& WXUNUSED(event))
 
     s_filename = filename;
 
-    wxString ext = filename.AfterFirst(_T('.'));
+    wxString ext = filename.AfterLast(_T('.'));
     wxFileType *ft = wxTheMimeTypesManager->GetFileTypeFromExtension(ext);
     if ( !ft )
     {