diff --git a/include/wx/os2/setup0.h b/include/wx/os2/setup0.h
index e48aee6a3d..a5db6eaf0e 100644
--- a/include/wx/os2/setup0.h
+++ b/include/wx/os2/setup0.h
@@ -364,5 +364,7 @@
 
 #define wxUSE_PALETTE             1
 
+#define wxUSE_CMDLINE_PARSER      1
+
 #endif
     // _WX_SETUP_H_