diff --git a/src/os2/utilsgui.cpp b/src/os2/utilsgui.cpp
index a3779dee7f..8fd49de630 100644
--- a/src/os2/utilsgui.cpp
+++ b/src/os2/utilsgui.cpp
@@ -437,7 +437,7 @@ void wxGUIAppTraits::TerminateGui(unsigned long ulHab)
     ::WinTerminate(ulHab);
 }
 
-wxPortId wxGUIAppTraits::GetToolkitVersion(int *verMaj, int *verMin) const
+wxPortId wxGUIAppTraits::GetToolkitVersion(int *WXUNUSED(verMaj), int *WXUNUSED(verMin)) const
 {
     // TODO: how to get version of PM ?
     return wxPORT_OS2;