diff --git a/samples/exec/exec.cpp b/samples/exec/exec.cpp
index 14a5ab2d2c..d11a4ac917 100644
--- a/samples/exec/exec.cpp
+++ b/samples/exec/exec.cpp
@@ -376,7 +376,8 @@ void MyFrame::OnKill(wxCommandEvent& WXUNUSED(event))
                                    _T("Enter PID:"),
                                    _T("Exec question"),
                                    m_pidLast,
-                                   1, INT_MAX,
+                                   // we need the full unsigned int range
+                                   -INT_MAX, INT_MAX,
                                    this);
     if ( pid == -1 )
     {